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Internetreadfile Error Code

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and policies of this site About Us Learn more about Stack Overflow httpsendrequest the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation internetopen example 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 https://msdn.microsoft.com/en-us/library/windows/desktop/aa385103(v=vs.85).aspx only takes a minute: Sign up Correct way to use InternetReadFile() asynchronously up vote 3 down vote favorite 1 I've got code that's performing HTTP requests using WinInet API's asynchronously. In general, my code works, but I'm confused about the 'right' way to do things. In the documentation for InternetReadFile(), it states: To ensure all data is retrieved, an application http://stackoverflow.com/questions/15748092/correct-way-to-use-internetreadfile-asynchronously must continue to call the InternetReadFile function until the function returns TRUE and the lpdwNumberOfBytesRead parameter equals zero. but in asynchronous mode, it may (or may not) return false, and an error of ERROR_IO_PENDING, indicating it'll do the work asynchronously, and call my callback when finished. If I read the documentation literally, it seems that the asynchronous calls could also just do a partial read of the requested buffer, and require the caller to keep calling InternetReadFile until a read of 0 bytes is encountered. A typical implementation using InternetReadFile() synchronously would look something like this: while(InternetReadFile(Request, Buffer, BufferSize, &BytesRead) && BytesRead != 0) { // do something with Buffer } but with the possibility that any one call to InternetReadFile() could signal that it's going to do the work asynchronously (and perhaps read part, but not all of your request), it becomes much more complicated. If I turn to MSDN sample code for guidance, the implementation is simple, simply calling InternetReadFile() once, and expecting a single return having read the entire requested buffer either instantly or asynchronously.

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 About Us Learn more http://stackoverflow.com/questions/521922/internetreadfile-problem-error-87-the-parameter-is-incorrect about Stack Overflow the company Business Learn more about hiring developers or posting http://forums.playpark.net/index.php?/topic/147055-fail-to-load-the-file-from-server-internetreadfile-method-has-failed-error-code-0x000d/ 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 InternetReadFile Problem (error 87 - The parameter is incorrect) up vote internetreadfile error 0 down vote favorite I have a problem here with InternetReadFile, if I run the application in a computer without proxy, the app runs ok, but if I try to use with a computer using proxy, I receive an error 87 (The parameter is incorrect). Thats my code: conHandle = InternetOpen("Test", INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0); ... hFile = InternetOpenUrl(conHandle, url.c_str(), NULL, 0, INTERNET_FLAG_RELOAD, 0); ... if (!InternetReadFile(hFile, buffer, maxBufferSize, internetreadfile error code &size)) { // error } And I also tried to use: InternetOpen("Test", INTERNET_OPEN_TYPE_PROXY, "proxystr", NULL, 0); but without success too. Anyone knows anything about what Im doing wrong? thankz, erick c++ winapi wininet share|improve this question asked Feb 6 '09 at 19:56 Erick add a comment| 2 Answers 2 active oldest votes up vote 1 down vote You need to keep calling InternetReadFile in a loop until it returns TRUE and the number of bytes read is 0. This usually means at least 2 calls to InternetReadFile. while ( InternetReadFile( hFile, buffer, maxBufferSize, &size ) == FALSE || size > 0 ) { // process buffer contents. // for ex: write the contents of buffer to a temp file for example. } share|improve this answer answered Aug 17 '09 at 10:18 Srikumar 36116 add a comment| up vote 0 down vote It should be: while (InternetReadFile(hFile, buffer, maxBufferSize, &size) == TRUE || size > 0) { // process buffer contents. // for ex: write the contents of buffer to a temp file for example. } share|improve this answer edited Sep 25 '11 at 0:19 LPL 12.1k42149 answered Oct 1 '09 at 10:17 Sumedh 1 add a comment| Your Answer draft saved draft discarded Sign

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Internetreadfile Error p 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 About Us Learn more about Stack Overflow the company Business internetopenurl msdn Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation internetwritefile Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of million programmers just like httpqueryinfo you helping each other Join them it only takes a minute Sign up Correct way to use InternetReadFile asynchronously

internetreadfile error

Internetreadfile Error p here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies internetreadfile c example of this site About Us Learn more about Stack Overflow the company Business p Internetreadfile Buffer Size p Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges p Internetopenurl Msdn p Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of million programmers just like you helping each other Join them it only takes a minute