Http Error 400 Proxy
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The Remote Server Returned An Error 400 Bad Request Httpwebrequest
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The Remote Server Returned An Error (400) Bad Request Outlook
Mike LaingNovember 27, 2012Tools Used in this Troubleshooter: Network Monitor HTTP Error logging This material http 400 bad request fix is provided for informational purposes only. Microsoft makes no warranties, express or implied. Overview After sending an HTTP request to an IIS server, the remote server returned an error (400) bad request. rest api an HTTP client (such as Internet Explorer) may display the following type of error message: The webpage cannot be found. HTTP 400 Most likely causes: There might be a typing error in the address. If you clicked on https://support.microsoft.com/en-us/kb/2988444 a link, it may be out of date. What you can try: Retype the address. Go back to the previous page. Go to Bing and look for the information you want. If the HTTP client is Internet Explorer, and the Show Friendly HTTP Error Messages option is turned off, the error may resemble the following: Bad Request In these scenarios, IIS has rejected the client's HTTP request because the request did not meet the server's HTTP parsing https://www.iis.net/learn/troubleshoot/diagnosing-http-errors/troubleshooting-http-400-errors-in-iis rules, or it exceeded time limits, or failed some other rule that IIS or HTTP.sys require incoming requests to adhere to. IIS sends the HTTP 400 - Bad Request status back to the client, and then terminates the TCP connection. Troubleshooting Methods When troubleshooting an HTTP 400 condition, it is important to remember that the underlying problem is that the client has sent a request to IIS that breaks one or more rules that HTTP.sys is enforcing. With that in mind, you will want to see exactly what the client is sending to IIS; to do this, capture a network trace of the client sending the bad request. You can analyze the trace to see the raw data that the client sends to IIS, and to see the raw response data that IIS sends back to the client. You can also use an HTTP sniffer tool called Fiddler; this is a great tool as it allows you to see the HTTP headers even if the client and server are communicating over SSL. The next data item you will want to use is the C:\Windows\System32\LogFiles\HTTPERR\httperr.log file. Beginning in IIS 6.0, the HTTP.sys component handles incoming HTTP requests before they are passed along to IIS, and is the component responsible for blocking requests that don't meet the IIS requirements. When HTTP.sys blocks the request, it will log information to its httperr.lo
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site http://stackoverflow.com/questions/12305558/making-php-curl-request-on-windows-yields-400-bad-request-from-proxy About Us Learn more about Stack Overflow the company Business Learn more about http://pcsupport.about.com/od/browsers/fl/http-400-bad-request.htm hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Making PHP cURL request bad request on Windows yields “400 Bad Request” from proxy up vote 2 down vote favorite Morning all Basically, I am unable to make successful cURL requests to internal and external servers from my Windows 7 development PC because of an issue involving a proxy server. I'm running cURL 7.21.2 thru PHP 5.3.6 on Apache 2.4. Here's a most basic request that fails: TRUE, CURLOPT_VERBOSE => TRUE, CURLOPT_HEADER => TRUE, CURLOPT_STDERR => $log_file, )); $response = curl_exec($curl); @fclose($log_file); print "
{$response}"; The following (complete) response is received. HTTP/1.1 400 Bad Request Date: Thu, 06 Sep 2012 17:12:58 GMT Content-Length: 171 Content-Type: text/html Server: IronPort httpd/1.1 Error response Error code 400. Message: Bad Request. Reason: None. The log file generated by cURL contains the following. * About to connect() to proxy usushproxy01.unistudios.com port 7070 (#0) * Trying 216.178.96.20... * connected * Connected to usushproxy01.unistudios.com (216.178.96.20) port 7070 (#0) > GET http://www.google.com HTTP/1.1 Host: www.google.com Accept: */* Proxy-Connection: Keep-Alive < HTTP/1.1 400 Bad Request < Date: Thu, 06 Sep 2012 17:12:58 GMT < Content-Length: 171 < Content-Type: text/html < Server: IronPort httpd/1.1 < * Connection #0 to host usushproxy01.unistudios.com left intact Explicitly stating the proxy and user credentials, as in the following, makes no difference: the response is always the same. TRUE, CURLOPT_VERBOSE => TRUE, CURLOPT_HEADER => TRUE, CURLOPT_STDERR => $log_file, CURLOPT_PROXY => 'http://usushproxy01.unistudios.com:7070', CURLOPT_PROXYUSERPWD => ': ', )); $response = curl_exec($curl); @fclose($log_file); print " {$response}"; I was surpriPhone Internet & Network Digital Cameras Home Theater Getting More Help Buy Buying Guides Product Reviews Software & Apps Do More Web & Search Social Media Gaming New & Next Fix Internet & Network How to Fix a 400 Bad Request Error Methods to Fix a 400 Bad Request Error Share Pin Email Internet & Network Error Messages Basics by Tim Fisher Updated October 02, 2016 The 400 Bad Request error is an HTTP status code that means that the request you sent to the website server, often something simple like a request to load a web page, was somehow incorrect or corrupted and the server couldn't understand it.400 Bad Request errors appear differently on different websites so you may see something from the short list below instead of just "400" or another simple variant like that: How You Might See the 400 Error"400 Bad Request""Bad Request. Your browser sent a request that this server could not understand.""Bad Request - Invalid URL""HTTP Error 400 - Bad Request""Bad Request: Error 400""HTTP Error 400. The request hostname is invalid.""400 - Bad request. The request could not be understood by the server due to malformed syntax. The client should not repeat the request without modifications."The 400 Bad Request error displays inside the Internet browser window, just as web pages do. 400 Bad Request errors, like all errors of this type, could be seen in any operating system and in any browser.In Internet Explorer, "The webpage cannot be found" message indicates a 400 Bad Request error. The IE title bar will say HTTP 400 Bad Request or something very similar to that.Windows Update can also report HTTP 400 errors but they display as error code 0x80244016 or with the following message: WU_E_PT_HTTP_STATUS_BAD_REQUEST. A 400 error that's reported for a link within a Microsoft Office application will often appear as a The remote server returned an error: (400) Bad Request. message within a small pop-up window.Cause of 400 Bad Request ErrorsThe 400 Bad Request error is oftentimes caused by entering or pasting the wrong URL in the address windo