Add read-only access to POST data for webRequest's onBeforeRequest

chrome/common/extensions/api/web_request.json

Index: chrome/common/extensions/api/web_request.json
diff --git a/chrome/common/extensions/api/web_request.json b/chrome/common/extensions/api/web_request.json
index af94afe869f5b54bae7412ffbe85889105e7099c..1bc2c69f47fe3ad16ac363708813e560c73ab10b 100644
--- a/chrome/common/extensions/api/web_request.json
+++ b/chrome/common/extensions/api/web_request.json
@@ -106,6 +106,24 @@
               "method": {"type": "string", "description": "Standard HTTP method."},
               "frameId": {"type": "integer", "description": "The value 0 indicates that the request happens in the main frame; a positive value indicates the ID of a subframe in which the request happens. If the document of a (sub-)frame is loaded (<code>type</code> is <code>main_frame</code> or <code>sub_frame</code>), <code>frameId</code> indicates the ID of this frame, not the ID of the outer frame. Frame IDs are unique within a tab."},
               "parentFrameId": {"type": "integer", "description": "ID of frame that wraps the frame which sent the request. Set to -1 if no parent frame exists."},
+              "postData": {
+                "type": "object",
+                "optional": true,
+                "description": "Experimental feature, only available in DEV or CANARY channels. Container for representations of data sent by the request via POST method. Only provided if extraInfoSpec contains 'postData'.",
+                "properties": {
+                  "error": {"type": "string", "optional": true, "enum": ["chunked_encoding"], "description": "Errors when obtaining POST data: 'chunked_encoding' means that the data is uploaded chunked, which is not currently supported by the WebRequest API."},
+                  "form": {
+                    "type": "object",
+                    "optional": true,
+                    "description": "If the POST data is a sequence of key-value pairs, encoded as either multipart/form-data, or application/x-www-form-urlencoded, this dictionary is present and for each key contains the list of all values for that key. If the data is of another media type, or if it is malformed, the dictionary is not present. It is also not present if the form upload is chunked. Example value of this dictionary is {'key': ['value1', 'value2']}.",
+                    "properties": {},
+                    "additionalProperties": {
+                      "type": "array",
+                      "items": { "type": "string" }
+                    }
+                  }
+                }
+              },
               "tabId": {"type": "integer", "description": "The ID of the tab in which the request takes place. Set to -1 if the request isn't related to a tab."},
               "type": {"type": "string", "enum": ["main_frame", "sub_frame", "stylesheet", "script", "image", "object", "xmlhttprequest", "other"], "description": "How the requested resource will be used."},
               "timeStamp": {"type": "number", "description": "The time when this signal is triggered, in milliseconds since the epoch."}
@@ -125,7 +143,7 @@
             "description": "Array of extra information that should be passed to the listener function.",
             "items": {
               "type": "string",
-              "enum": ["blocking"]
+              "enum": ["blocking", "postData"]
             }
           }
         ],