Set Expect header to empty in the request. FIX: In lib/googleapi.php (ln 345): re-work the google docs send_file function to support request failure in these circumstances. Suggested code for review (new bit is the If with comment): (note code spacing between brackets and braces is wrong - the rest of the file is like this so I followed) <pre> /** Sends a file object to google documents * @param object $file File object @return boolean True on success */ public function send_file($file){ $this->google_curl->resetopt(); $this->google_curl->setHeader("Content-Length: ". $file->get_filesize()); $this->google_curl->setHeader("Content-Type: ". $file->get_mimetype()); $this->google_curl->setHeader("Slug: ". $file->get_filename()); $this->google_curl->post(google_docs::DOCUMENTFEED_URL, $file->get_content()); if($this->google_curl->info ['http_code'] === 201) { return true; } else if($this->google_curl->info ['http_code'] === 417){ //MDL-? Support http 1.0 proxies. $this->google_curl->setHeader("Content-Type: ". $file->get_mimetype()); $this->google_curl->setHeader('Expect:'); $this->google_curl->post(google_docs::DOCUMENTFEED_URL, $file->get_content()); if($this->google_curl->info ['http_code'] === 201) { return true; } else { return false; } //End MDL-? }else { return false; } } </pre>

Only occurs on sites behind Squid proxy. 1. Enable 'portfolios' and Google Docs portfolio plugin at site level. 2. Create a post in any forum. 3. Make sure it has a fair amount of text in it e.g. 20 lines. 4. Select Export link and select Google Docs (if choice presented) 5. Success message should be displayed