1 | package eu.clarin.cmdi.mdservice.action; |
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2 | |
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3 | import java.io.BufferedInputStream; |
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4 | import java.io.BufferedReader; |
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5 | import java.io.File; |
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6 | import java.io.FileInputStream; |
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7 | import java.io.IOException; |
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8 | import java.io.InputStream; |
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9 | import java.io.InputStreamReader; |
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10 | import java.net.MalformedURLException; |
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11 | import java.net.URISyntaxException; |
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12 | import java.net.URL; |
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13 | import java.util.HashMap; |
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14 | |
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15 | import javax.servlet.http.HttpServletRequest; |
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16 | import javax.servlet.http.HttpSession; |
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17 | import javax.xml.transform.TransformerException; |
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18 | |
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19 | import net.sf.json.JSON; |
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20 | import net.sf.json.JSONArray; |
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21 | import net.sf.json.JSONObject; |
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22 | import net.sf.json.JSONSerializer; |
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23 | |
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24 | |
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25 | import org.apache.struts2.interceptor.ServletRequestAware; |
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26 | |
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27 | import com.opensymphony.xwork2.ActionSupport; |
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28 | |
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29 | /** |
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30 | * main Struts 2 controller |
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31 | * responds to requests (collections, model, recordset) |
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32 | * by dispatching the requests to appropriate internal methods and filling the inputStream with the result |
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33 | * |
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34 | * @author vronk |
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35 | * |
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36 | */ |
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37 | public class GenericProxyAction extends ActionSupport |
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38 | implements ServletRequestAware |
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39 | { |
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40 | |
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41 | private static final long serialVersionUID = 1L; |
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42 | |
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43 | private static JSONArray repositories = null; |
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44 | /** |
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45 | * Properties to be filled by Struts with according request-parameters |
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46 | */ |
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47 | private String actionkey; |
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48 | private String q; |
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49 | private String squery; |
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50 | private String cache = Cache.USE; |
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51 | private String collection; |
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52 | private String columns; |
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53 | private String startItem; |
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54 | private String maximumItems; |
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55 | private String sort; |
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56 | private String lang="en"; |
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57 | private int maxdepth; |
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58 | private String format; |
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59 | private String options; |
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60 | private String actionContentType; |
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61 | private String userMsg; |
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62 | private int repository; |
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63 | //private Map<String,Object> session; |
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64 | private HttpServletRequest request; |
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65 | private long duration = 0; |
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66 | |
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67 | public GenericProxyAction(){ |
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68 | super(); |
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69 | initialize(); |
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70 | } |
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71 | |
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72 | protected void initialize(){ |
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73 | repository = 1; |
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74 | } |
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75 | public String getQ() { |
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76 | return q; |
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77 | } |
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78 | |
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79 | public void setQ(String pq) { |
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80 | if (pq == null) pq=""; |
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81 | /* |
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82 | if (q != null){ |
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83 | if (q.trim().length() == 0){ |
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84 | q = null; |
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85 | } |
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86 | } |
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87 | */ |
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88 | this.q = pq; |
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89 | } |
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90 | |
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91 | public String getSquery() { |
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92 | return squery; |
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93 | } |
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94 | |
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95 | public void setSquery(String psquery) { |
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96 | if (psquery==null) psquery=""; |
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97 | this.squery = psquery; |
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98 | } |
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99 | |
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100 | public String getCache() { |
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101 | return cache; |
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102 | } |
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103 | |
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104 | public void setCache(String cache) { |
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105 | this.cache = cache; |
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106 | } |
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107 | |
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108 | public String getCollection() { |
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109 | return collection; |
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110 | } |
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111 | |
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112 | public void setCollection(String collection) { |
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113 | this.collection = collection; |
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114 | } |
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115 | |
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116 | //TODO defaults |
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117 | public String getColumns() { |
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118 | String cols = columns; |
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119 | /*if (columns == null){ |
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120 | cols = "Id,Name,Title"; |
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121 | } |
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122 | */ |
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123 | return cols; |
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124 | } |
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125 | |
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126 | public void setColumns(String columns) { |
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127 | this.columns = columns; |
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128 | } |
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129 | |
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130 | public int getMaxdepth() { |
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131 | return maxdepth; |
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132 | } |
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133 | |
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134 | public void setMaxdepth(int maxdepth) { |
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135 | this.maxdepth = maxdepth; |
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136 | } |
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137 | |
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138 | public String getFormat() { |
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139 | return format; |
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140 | } |
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141 | |
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142 | public void setFormat(String format) { |
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143 | this.format = format; |
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144 | } |
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145 | |
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146 | public String getOptions() { |
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147 | return options; |
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148 | } |
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149 | |
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150 | public void setOptions(String options) { |
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151 | this.options = options; |
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152 | } |
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153 | |
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154 | public String getActionContentType() { |
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155 | if (format.toLowerCase().startsWith("html")) { |
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156 | this.actionContentType = "text/html"; |
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157 | } else { |
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158 | this.actionContentType = "text/xml"; |
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159 | } |
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160 | |
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161 | return actionContentType; |
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162 | } |
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163 | |
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164 | public void setActionContentType(String actionContentType) { |
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165 | this.actionContentType = actionContentType; |
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166 | } |
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167 | |
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168 | |
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169 | public void setRepository(int repository) { |
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170 | this.repository = repository; |
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171 | } |
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172 | |
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173 | public int getRepository() { |
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174 | //default repository = 1 (set on init) |
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175 | |
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176 | return repository; |
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177 | } |
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178 | public String getActionkey() { |
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179 | return actionkey; |
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180 | } |
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181 | |
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182 | public void setActionkey(String actionKey) { |
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183 | actionkey = actionKey; |
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184 | } |
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185 | |
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186 | |
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187 | public String getStartItem() { |
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188 | return startItem; |
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189 | } |
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190 | |
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191 | public void setStartItem(String startItem) { |
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192 | this.startItem = startItem; |
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193 | } |
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194 | |
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195 | public String getMaximumItems() { |
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196 | return maximumItems; |
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197 | } |
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198 | |
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199 | public void setMaximumItems(String maximumItems) { |
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200 | this.maximumItems = maximumItems; |
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201 | } |
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202 | |
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203 | |
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204 | public String getSort() { |
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205 | return sort; |
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206 | } |
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207 | |
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208 | public void setSort(String sort) { |
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209 | this.sort = sort; |
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210 | } |
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211 | |
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212 | public String getLang() { |
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213 | return lang; |
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214 | } |
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215 | |
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216 | public void setLang(String lang) { |
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217 | this.lang = lang; |
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218 | } |
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219 | |
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220 | public String getFullFormat() { |
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221 | return actionkey + "2" + format; |
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222 | } |
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223 | |
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224 | /** |
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225 | * primitive identification of the target-proxy |
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226 | * base for finding the right base_url in the props |
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227 | * subclass has to override with its specific proxykey |
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228 | * @return |
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229 | */ |
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230 | public String getProxyKey() { |
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231 | return ""; |
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232 | } |
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233 | |
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234 | public String getUserMsg() { |
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235 | return userMsg; |
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236 | } |
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237 | |
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238 | public void setUserMsg(String userMsg) { |
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239 | this.userMsg = this.userMsg + "\n" + userMsg; |
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240 | } |
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241 | |
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242 | @Override |
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243 | public void setServletRequest(HttpServletRequest arg0) { |
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244 | request = arg0; |
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245 | } |
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246 | |
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247 | public HttpServletRequest getServletRequest() { |
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248 | return request; |
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249 | } |
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250 | |
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251 | |
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252 | private InputStream resultStream; |
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253 | private InputStream sourceStream; |
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254 | |
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255 | /** |
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256 | * The stream holding the resulting data to be sent back to the user as response |
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257 | * @return |
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258 | */ |
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259 | public InputStream getResultStream() { |
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260 | return resultStream; |
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261 | } |
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262 | public void setResultStream(InputStream _resultStream){ |
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263 | resultStream = _resultStream; |
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264 | } |
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265 | public void setSourceStream(InputStream _sourceStream){ |
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266 | sourceStream = _sourceStream; |
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267 | } |
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268 | |
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269 | /* |
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270 | public InputStream getSourceStream() throws IOException { |
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271 | return getTargetRequest().openStream(); |
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272 | } |
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273 | */ |
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274 | |
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275 | public JSONArray getRepositories(){ |
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276 | return repositories; |
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277 | } |
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278 | |
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279 | public void setRepositories(JSONArray rep){ |
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280 | this.repositories = rep; |
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281 | } |
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282 | |
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283 | protected URL base_url ; |
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284 | |
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285 | public URL getBaseURL() throws MalformedURLException { |
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286 | if (base_url == null) { |
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287 | base_url = new URL(getBaseURI());//Admin.getConfig().getProperty(getProxyKey() + ".uri")); |
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288 | } |
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289 | return base_url; |
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290 | } |
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291 | |
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292 | public String getBaseURI() { |
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293 | String uri =Admin.getConfig().getProperty(getProxyKey() + ".uri"); |
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294 | return uri; |
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295 | } |
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296 | |
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297 | |
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298 | public URL getTargetRequest() throws IOException { |
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299 | // URL targetURL =new URL( base_url, compname + ".xml"); |
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300 | URL targetURL = getBaseURL(); |
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301 | |
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302 | return targetURL; |
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303 | } |
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304 | |
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305 | /* |
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306 | public String getRequestKey() { |
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307 | String key=""; |
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308 | if (getActionkey()!=null) { |
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309 | key += getActionkey() + "//-" ; |
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310 | } |
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311 | if (getQ()!=null) { |
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312 | key += getQ() + "//-" ; |
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313 | } |
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314 | if (getCollection()!=null) { |
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315 | key += getCollection(); |
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316 | } |
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317 | |
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318 | return key; |
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319 | } |
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320 | */ |
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321 | |
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322 | public String getRequestKey() { |
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323 | String key=""; |
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324 | if (getActionkey()!=null) { |
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325 | key += getActionkey() + "//-" ; |
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326 | }else { |
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327 | key +="//-" ; |
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328 | } |
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329 | if (getQ()!=null) { |
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330 | key += getQ() + "//-" ; |
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331 | } else { |
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332 | key +="//-" ; |
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333 | } |
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334 | if (getCollection()!=null) { |
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335 | key += getCollection() + "//-"; |
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336 | } else { |
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337 | key +="//-" ; |
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338 | } |
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339 | if (getSquery()!=null) { |
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340 | key += getSquery() + "//-" ; |
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341 | } else { |
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342 | key +="//-" ; |
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343 | } |
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344 | if (getStartItem()!=null) { |
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345 | key += getStartItem() + "//-"; |
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346 | } |
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347 | else{ |
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348 | key +="//-" ; |
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349 | } |
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350 | if (getMaximumItems()!=null) { |
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351 | key += getMaximumItems() + "//-"; |
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352 | } |
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353 | else{ |
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354 | key +="//-" ; |
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355 | } |
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356 | |
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357 | key += getRepository() + "//-"; |
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358 | key += getMaxdepth() + "//-"; |
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359 | |
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360 | if (getLang()!=null) { |
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361 | key += getLang() + "//-"; |
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362 | }else{ |
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363 | key +="//-" ; |
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364 | } |
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365 | |
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366 | |
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367 | return key; |
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368 | } |
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369 | public InputStream getSourceStream() throws IOException { |
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370 | return getTargetRequest().openStream(); |
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371 | // Admin.notifyUser(getProxyKey() + ".getSourceStream() - unable to open stream: " + getTargetRequest(); |
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372 | } |
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373 | |
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374 | public static String convertStreamToString(InputStream is) { |
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375 | |
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376 | BufferedReader reader = new BufferedReader(new InputStreamReader(is)); |
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377 | StringBuilder sb = new StringBuilder(); |
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378 | String line = null; |
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379 | |
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380 | try { |
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381 | while ((line = reader.readLine()) != null) { |
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382 | sb.append(line + "\n"); |
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383 | } |
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384 | } catch (IOException e) { |
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385 | // TODO Auto-generated catch block |
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386 | e.printStackTrace(); |
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387 | } finally { |
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388 | try { |
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389 | is.close(); |
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390 | } catch (IOException e) { |
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391 | // TODO Auto-generated catch block |
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392 | e.printStackTrace(); |
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393 | } |
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394 | try { |
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395 | is.reset(); |
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396 | } catch (IOException e) { |
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397 | // TODO Auto-generated catch block |
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398 | e.printStackTrace(); |
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399 | } |
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400 | } |
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401 | |
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402 | |
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403 | return sb.toString(); |
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404 | } |
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405 | |
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406 | |
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407 | public static JSONArray createRepositories() throws IOException, InterruptedException, TransformerException{ |
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408 | String path = Admin.getConfig().getProperty("workspaceprofile.path") + WorkspaceAction.PROFILENAME_SERVER; |
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409 | File file=new File(path); |
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410 | InputStream in = new BufferedInputStream( new FileInputStream(path));; |
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411 | |
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412 | MDTransformer transformer = new MDTransformer(); |
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413 | transformer.setSrcFile(file.toURL()); |
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414 | transformer.setParams(MDTransformer.createParamsMap("xml2json")); |
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415 | InputStream jsonstream = transformer.transformXML(in); |
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416 | |
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417 | JSONObject json = JSONObject.fromObject(convertStreamToString(jsonstream)); |
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418 | JSONArray array = json.getJSONObject("WorkspaceProfile").getJSONArray("Repositories"); |
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419 | |
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420 | // repository as static variable |
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421 | return array; |
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422 | |
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423 | // repository as session attribute |
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424 | /* |
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425 | HttpSession session = getServletRequest().getSession(); |
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426 | //JSONArray param = (JSONArray) session.getAttribute("repositories"); |
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427 | JSONArray param = new JSONArray(); |
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428 | param.add(array); |
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429 | session.setAttribute("repositories", param); |
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430 | */ |
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431 | } |
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432 | |
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433 | |
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434 | public String getRepositoryPath(){ |
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435 | String repository_path = null; |
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436 | |
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437 | |
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438 | if (repositories == null ) { |
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439 | try { |
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440 | setRepositories(GenericProxyAction.createRepositories()); |
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441 | } catch (IOException e) { |
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442 | // TODO Auto-generated catch block |
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443 | e.printStackTrace(); |
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444 | } catch (InterruptedException e) { |
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445 | // TODO Auto-generated catch block |
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446 | e.printStackTrace(); |
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447 | } catch (TransformerException e) { |
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448 | // TODO Auto-generated catch block |
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449 | e.printStackTrace(); |
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450 | } |
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451 | } |
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452 | // static repositories |
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453 | net.sf.json.JSONArray json = getRepositories(); |
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454 | for(int i=0;i<json.size();i++){ |
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455 | if (json.getJSONObject(i).getInt("id") == getRepository()){ |
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456 | repository_path = json.getJSONObject(i).getString("uri"); |
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457 | } |
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458 | } |
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459 | //Admin.notifyUser("REPOSITORY_PATH:" + repository_path); |
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460 | |
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461 | //session repositories |
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462 | /* |
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463 | HttpSession session = getServletRequest().getSession(); |
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464 | json = (net.sf.json.JSONArray) session.getAttribute("repositories"); |
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465 | for(int i=0;i<json.size();i++){ |
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466 | if (json.getJSONObject(i).getInt("id") == getRepository()){ |
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467 | repository_path = json.getJSONObject(i).getString("uri"); |
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468 | } |
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469 | } |
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470 | Admin.notifyUser("REPOSITORY_PATH-SESSIONATTR:" + repository_path); |
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471 | */ |
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472 | return repository_path; |
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473 | |
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474 | } |
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475 | |
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476 | public String addDurationKey(){ |
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477 | String req_key = getRequestKey(); |
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478 | |
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479 | Double duration_d; |
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480 | |
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481 | duration_d = (double)duration; |
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482 | duration_d = duration_d/1000.0; |
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483 | req_key += duration_d + "//-"; |
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484 | return req_key; |
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485 | } |
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486 | |
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487 | public HashMap<String,String> createTransformerParams(){ |
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488 | |
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489 | HashMap<String,String> hm = new HashMap<String,String>(); |
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490 | |
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491 | if (getFullFormat() != null){ |
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492 | hm.put("format", getFullFormat()); |
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493 | } |
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494 | if (getColumns() != null){ |
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495 | hm.put("cols", getColumns()); |
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496 | } |
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497 | if (getStartItem() != null){ |
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498 | hm.put("startItem", getStartItem()); |
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499 | } |
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500 | if (getMaximumItems() != null){ |
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501 | hm.put("maximumItems", getMaximumItems()); |
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502 | } |
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503 | if (getLang() != null){ |
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504 | hm.put("lang", getLang()); |
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505 | } |
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506 | if (getQ() != null){ |
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507 | hm.put("q", getQ()); |
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508 | } |
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509 | if (getRepository() != 0){ |
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510 | hm.put("repository_id", String.valueOf(getRepository())); |
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511 | } |
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512 | |
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513 | return hm; |
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514 | |
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515 | } |
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516 | |
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517 | public void prepare() throws Exception { |
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518 | |
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519 | String req_key = getRequestKey(); |
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520 | Admin.notifyUser("request_key: " + req_key); |
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521 | Admin.notifyUser(getProxyKey() + ".targetURL: " + getTargetRequest() + " .format:" + getFullFormat()); |
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522 | |
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523 | // Caching |
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524 | String xcid; |
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525 | |
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526 | // Admin.notifyUser("GPA.prepareSourceStream"); |
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527 | |
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528 | if (getCache().equals(Cache.SKIP)) { |
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529 | |
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530 | sourceStream = getSourceStream(); |
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531 | |
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532 | } else { |
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533 | if (getCache().equals(Cache.USE)) { |
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534 | sourceStream = Cache.getCache().getFromCache(req_key); |
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535 | } |
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536 | if (sourceStream == null) { // either not in cache or cache_flag=refresh |
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537 | //sourceStream = getTargetRequest().openStream(); |
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538 | long startMillis = System.currentTimeMillis(); |
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539 | sourceStream = getSourceStream(); |
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540 | duration = System.currentTimeMillis() - startMillis; |
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541 | req_key = addDurationKey(); |
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542 | |
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543 | long now = System.currentTimeMillis(); |
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544 | xcid = Cache.getCache().putInCache(req_key,sourceStream); |
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545 | Admin.notifyUser("putting in cache: " + req_key); |
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546 | sourceStream = Cache.getCache().getFromCache(req_key); |
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547 | } else { |
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548 | Admin.notifyUser("reading from cache: " + req_key); |
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549 | } |
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550 | } |
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551 | |
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552 | if (format.equals("xml")) { |
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553 | resultStream = sourceStream; |
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554 | }else { |
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555 | // set URL as srcFile (for MDTransformer to pass to xsl-scripts) |
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556 | MDTransformer transformer = new MDTransformer(); |
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557 | transformer.setSrcFile(getTargetRequest()); |
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558 | // getColumns |
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559 | Admin.notifyUser("GPA.getRepository, before xsl:" + getRepository()); |
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560 | transformer.setParams(createTransformerParams()); |
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561 | resultStream = transformer.transformXML(sourceStream);//, getFullFormat(), getColumns(), getStartRecord(), getMaximumRecords(),getLang(),getQ(),String.valueOf(getRepository())); |
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562 | } |
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563 | |
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564 | Admin.notifyUser(getProxyKey() + " success:" + (resultStream!=null)); |
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565 | } |
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566 | |
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567 | /** |
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568 | * default Action method |
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569 | */ |
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570 | public String execute() throws Exception { |
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571 | // HttpServletRequest request = ServletActionContext.getRequest(); |
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572 | |
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573 | |
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574 | Admin.notifyUser("session-attrs:"); |
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575 | Admin.notifyUser(getServletRequest().getRemoteUser() ); |
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576 | //Admin.notifyUser(String.valueOf(getSession())); |
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577 | |
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578 | long now = System.currentTimeMillis(); |
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579 | |
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580 | prepare(); |
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581 | long duration = (System.currentTimeMillis() - now); |
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582 | //duration |
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583 | |
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584 | if (resultStream == null) { |
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585 | return ERROR; |
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586 | } else { |
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587 | return SUCCESS; |
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588 | } |
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589 | } |
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590 | |
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591 | |
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592 | } |
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