wininet

Unable to query proxy “Automatically Detect Settings” on windows 7

由 泪湿孤枕 提交于 2019-12-19 04:06:12
问题 I am trying to capture proxy setting ("Automatically Detect Settings"). My code works on XP and Vista. But it is NOT working on Windows 7 Please see the details of target platform Windows 7 Enterprise, IE 8.0.7600.16385, Wininet.dll 8.0.7600.16535 Please see the code snippet INTERNET_PER_CONN_OPTION_LIST List; INTERNET_PER_CONN_OPTION Option[1]; unsigned long nSize = sizeof(INTERNET_PER_CONN_OPTION_LIST); Option[0].dwOption = INTERNET_PER_CONN_FLAGS; List.dwSize = sizeof(INTERNET_PER_CONN

how to contruct HttpSendRequest method of WININET

由 这一生的挚爱 提交于 2019-12-19 03:54:07
问题 I have dummy web service with URI =http://localhost/IO_100_Service.svc/xml?id={id} which return data in XML format I want to call this service using WINInet APi in VC++.Can anybody help me how to use contruct "HttpSendRequest" method to add header and data to call this service . 回答1: Here is a sample code you should be able to modify to your needs. I tested it with VS2005 using command line template project. #include <tchar.h> #include <wininet.h> /// .... HINTERNET hIntSession = :

Saving a webpage to disk using C++

由 戏子无情 提交于 2019-12-18 09:39:25
问题 I've managed to download a "file" from the internet with the help of wininet library, but I can't seem to save a "webpage" i.e. something I can edit later on with a text editor or with ifstream . In this case, what are the tools I should resort to? Can wininet save a webpage to disk? Should I consider cURL (though I haven't managed to download regular files due to lack of documentation of cURL )? Do I need to learn what's called socket programming ? NB: I'm on Windows, using MinGW but can

How can I prevent URLDownloadToFile from retrieving from the cache?

由 无人久伴 提交于 2019-12-17 20:25:21
问题 I am using URLDownloadToFile to retrieve a file from a website. Subsequent calls return the original file rather than an updated version. I assume it is retrieving a cached version. 回答1: Call DeleteUrlCacheEntry with the same URL just prior to calling URLDownloadToFile. You will need to link against Wininet.lib 回答2: Yes, it is pulling a cached version of the file by default. To avoid the cache file completely, pass an IBindStatusCallback object in the lpfnCB parameter of URLDownloadToFile().

Upload file via POST

由 ╄→尐↘猪︶ㄣ 提交于 2019-12-17 19:55:57
问题 I have the necessity to implements a file upload on a web server in C++, I succeed with the following code: #include <windows.h> #include <wininet.h> #include <iostream> #define ERROR_OPEN_FILE 10 #define ERROR_MEMORY 11 #define ERROR_SIZE 12 #define ERROR_INTERNET_OPEN 13 #define ERROR_INTERNET_CONN 14 #define ERROR_INTERNET_REQ 15 #define ERROR_INTERNET_SEND 16 using namespace std; int main() { // Local variables static char *filename = "test.txt"; //Filename to be loaded static char *type

Why is FormatMessage() failing to find a message for WinINet errors?

由 随声附和 提交于 2019-12-17 16:34:46
问题 I'm running this to test FormatMessage: LPVOID lpMsgBuf; errCode=12163; FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM , 0, errCode, 0, (LPTSTR) &lpMsgBuf, 0, NULL ); However, when it returns lpMsgBuf contains NULL... I was expecting something like ERROR_INTERNET_DISCONNECTED. Anything look wrong? Thanks. 回答1: That's a WinINet error, and so the message associated with it lives in WinINet.dll. You just need to tell FormatMessage() about this in order for it to

Winform文件下载之WinINet

由 随声附和 提交于 2019-12-17 14:15:08
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 在C#中，除了webclient我们还可以使用一组WindowsAPI来完成下载任务。这就是Windows Internet，简称 WinINet。本文通过一个demo来介绍WinINet的基本用法和一些实用技巧。 系列文章 Winform文件下载之WebClient 接口介绍 相比WebClient的用法，Win32API在使用时可能会烦琐一些。所以先把用到的API简单介绍一下。 资源的初始化和释放 InternetOpen 这是需要调用的第一个方法，它会初始化内部数据结构，为后面的调用做准备。 InternetCloseHandle 这个方法用来关闭使用中打开的Internet句柄，释放资源。 建立到服务器的连接 InternetOpenUrl 这是一个通用的函数，应用程序可以用它来请求数据(只要是WinINet支持的协议就可以)。尤其是当我们仅仅想要通过一个URL获取数据，而不关心通信协议相关的内容时，这个接口就特别合适。该方法会解析参数中的URL字符串，然后建立到服务器的连接，并准备下载由RUL标识的数据。 检查响应信息 HttpQueryInfo 检索与HTTP请求相关的报头信息。主要是查看请求是否成功。 读取响应内容 InternetReadFile 从

InternetCrackUrl() function

由 浪子不回头ぞ 提交于 2019-12-14 03:16:15
问题 I've got a little problem with this function when I'm trying to crack my URL in URL_COMPONENTS structure, the value of HostName and urlPath members stays on '\0' and meanwhile it's so, I have the true Length of both(HostName and urlPath members). what is the problem?, it' would be my pleasure if you answer by code. Thanks and best wishes, John Smith. URL_COMPONENTS urlcomponents; urlcomponents.dwStructSize=sizeof(URL_COMPONENTS); urlcomponents.dwHostNameLength=10; urlcomponents

URLDownloadToFile() writes objects in the cache when run as a service

由 允我心安 提交于 2019-12-14 02:49:21
问题 I have a piece of software that downloads images into a working directory and then processes them to create a video; afterwards, those files are removed by an independent script. The problem is that it also writes files into the following directory (the software runs as a system service): C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5 To make things worse, there doesn't seem to be a limit to how many files are kept there; this

InternetOpenUrl hangs and fails on third and subsequent calls

由 喜你入骨 提交于 2019-12-14 02:07:36
问题 This is some bizarre, but reproducible, behavior. I can call InternetOpenUrl exactly two times per URL and everything works as I would expect. If I call it again after that, it times out at exactly 60 seconds and does not return a handle to the web resource. I created the following minimum code example to demonstrate the problem (this is an adaptation of the AllAPI Mentalis sample): Private Const scUserAgent = "API-Guide test program" Private Const INTERNET_OPEN_TYPE_DIRECT = 1 Private Const
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