Check length before reading post data.

patwonder · patwonder · commit 7281f6200d50 · 2015-04-11T15:14:10.000+08:00
Fixes a rare exception while auto-switching to IE engine.
diff --git a/extension/modules/ContentPolicy.jsm b/extension/modules/ContentPolicy.jsm
@@ -374,7 +374,8 @@ var PolicyPrivate = {
     if (uploadChannel && uploadChannel.uploadStream)
     {
       let len = uploadChannel.uploadStream.available();
-      post = NetUtil.readInputStreamToString(uploadChannel.uploadStream, len);
+      if (len > 0)
+        post = NetUtil.readInputStreamToString(uploadChannel.uploadStream, len);
     }
 
     // Pass the navigation paramters througth tab attributes

Original file line number	Diff line number	Diff line change
`@@ -374,7 +374,8 @@ var PolicyPrivate = {`
`374`	`374`	`if (uploadChannel && uploadChannel.uploadStream)`
`375`	`375`	`{`
`376`	`376`	`let len = uploadChannel.uploadStream.available();`
`377`		`- post = NetUtil.readInputStreamToString(uploadChannel.uploadStream, len);`
	`377`	`+ if (len > 0)`
	`378`	`+ post = NetUtil.readInputStreamToString(uploadChannel.uploadStream, len);`
`378`	`379`	`}`
`379`	`380`
`380`	`381`	`// Pass the navigation paramters througth tab attributes`