在花了几天的时间把我的头撞到墙上后，我想我应该在这里问一下。
下面代码的问题是我基本上是在迭代一个目录，将文件上传到那里。所有文件都很小，大小约为 1KB，因此这不是大小问题。第一次上传顺利通过，所有后续调用都因 winhttp 仅发送 header 而中断。
代码如下:
BOOL NetworkManager::UploadFileToServer(wchar_t *pszURL, wchar_t *pszFilePath, wchar_t *_pszProxyAddress, wchar_t *pszServerAddress)
{
HINTERNET hSession = NULL,
hConnect = NULL,
hRequest = NULL;
BOOL bResults;
DWORD dwSize = 0;
DWORD dwContentLength = 0;
LPCWSTR pszProxyAddress = 0;
wchar_t wszContentLength[256] = { 0 };
pszProxyAddress = _pszProxyAddress;
printf("Trying to send %S\r\n", pszFilePath);
if(pszProxyAddress != NULL && wcslen(pszProxyAddress) < 4)
{
pszProxyAddress = NULL;
}
HANDLE hFile = CreateFile(pszFilePath, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, NULL, NULL);
if(hFile == INVALID_HANDLE_VALUE)
{
printf("UM: Unable to open the file for sending, aborting...\r\n");
return FALSE;
}
DWORD dwFileSize = GetFileSize(hFile, NULL);
// Use WinHttpOpen to obtain a session handle.
if(pszProxyAddress == NULL)
{
hSession = WinHttpOpen( L"Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko",
WINHTTP_ACCESS_TYPE_DEFAULT_PROXY,
NULL,
WINHTTP_NO_PROXY_BYPASS, 0);
}
else
{
hSession = WinHttpOpen( L"Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko",
WINHTTP_ACCESS_TYPE_NAMED_PROXY,
pszProxyAddress,
WINHTTP_NO_PROXY_BYPASS, 0);
}
// Specify an HTTP server.
if (hSession)
{
hConnect = WinHttpConnect( hSession, _pszServerAddress,
INTERNET_DEFAULT_HTTPS_PORT, 0);
}
else
{
printf("hSession failed, errorcode 0x%08x\r\n", GetLastError());
return FALSE;
}
// Create an HTTP request handle.
if (hConnect)
{
hRequest = WinHttpOpenRequest( hConnect, L"POST", L"upload.php",
NULL, WINHTTP_NO_REFERER,
WINHTTP_DEFAULT_ACCEPT_TYPES,
WINHTTP_FLAG_SECURE);
}
else
{
printf("hConnect failed, errorcode 0x%08x\r\n", GetLastError());
WinHttpCloseHandle(hSession);
return FALSE;
}
PHEAP_BUFFER pBuf = NULL;
DWORD dwBytesWritten = 0;
// Send a request.
if (hRequest)
{
DWORD options = SECURITY_FLAG_IGNORE_CERT_CN_INVALID | SECURITY_FLAG_IGNORE_CERT_DATE_INVALID | SECURITY_FLAG_IGNORE_UNKNOWN_CA ;
bResults = WinHttpSetOption( hRequest, WINHTTP_OPTION_SECURITY_FLAGS , (LPVOID)&options, sizeof (DWORD) );
WinHttpAddRequestHeaders(hRequest, L"Content-Type: multipart/form-data; boundary=----BoundaryXu02", (ULONG) -1L, WINHTTP_ADDREQ_FLAG_ADD);
dwContentLength = strlen(pszFormHeader) + dwFileSize + strlen(pszFinalBoundary);
DWORD dwTotalSent = 0;
pBuf = MemoryManager::AllocateHeapMemory(dwContentLength, 1);
DWORD dwBytesRead = 0;
strcat_s((PCHAR)pBuf->pBuffer, pBuf->dwBufferSize, pszFormHeader);
ReadFile(hFile, &pBuf->pBuffer[strlen(pszFormHeader)], dwFileSize, &dwBytesRead, NULL);
memcpy(&pBuf->pBuffer[strlen(pszFormHeader) + dwFileSize], pszFinalBoundary, strlen(pszFinalBoundary));
wsprintf(wszContentLength, L"Content-Length: %d", dwContentLength);
bResults = WinHttpSendRequest( hRequest, wszContentLength, -1, 0, 0, dwContentLength, 0);
printf("Sending out the request\r\n");
WinHttpWriteData(hRequest, pBuf->pBuffer, pBuf->dwBufferSize, &dwBytesWritten);
}
else
{
printf("hRequest failed, errorcode 0x%08x\r\n", GetLastError());
WinHttpCloseHandle(hSession);
WinHttpCloseHandle(hConnect);
return FALSE;
}
//WinHttpWriteData(hRequest, pBuf->pBuffer, pBuf->dwBufferSize, &dwBytesWritten);
// End the request.
if (bResults)
{
bResults = WinHttpReceiveResponse( hRequest, NULL);
}
else
{
printf("hResults failed, errorcode 0x%08x\r\n");
WinHttpCloseHandle(hRequest);
WinHttpCloseHandle(hConnect);
WinHttpCloseHandle(hSession);
MemoryManager::FreeHeapMemory(pBuf);
return FALSE;
}
WinHttpQueryDataAvailable(hRequest, &dwBytesWritten);
// Close any open handles.
if (hRequest) WinHttpCloseHandle(hRequest);
if (hConnect) WinHttpCloseHandle(hConnect);
if (hSession) WinHttpCloseHandle(hSession);
MemoryManager::FreeHeapMemory(pBuf);
CloseHandle(hFile);
DeleteFile(pszFilePath);
return TRUE;
}
这是来自服务器的访问日志:
xxx.xxx.xxx.244 - - [09/Jan/2014:16:39:33 +0200] "POST /upload.php HTTP/1.1" 200 1811 "-" "Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko"
xxx.xxx.xxx.244 - - [09/Jan/2014:16:39:33 +0200] "POST /upload.php HTTP/1.1" 200 295 "-" "Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko"
xxx.xxx.xxx.244 - - [09/Jan/2014:16:39:33 +0200] "POST /upload.php HTTP/1.1" 200 295 "-" "Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko"
xxx.xxx.xxx.244 - - [09/Jan/2014:16:39:33 +0200] "POST /upload.php HTTP/1.1" 200 295 "-" "Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko"
xxx.xxx.xxx.244 - - [09/Jan/2014:16:39:33 +0200] "POST /upload.php HTTP/1.1" 200 295 "-" "Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko"
xxx.xxx.xxx.244 - - [09/Jan/2014:16:39:34 +0200] "POST /upload.php HTTP/1.1" 200 295 "-" "Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko"
xxx.xxx.xxx.244 - - [09/Jan/2014:16:39:34 +0200] "POST /upload.php HTTP/1.1" 200 295 "-" "Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko"
xxx.xxx.xxx.244 - - [09/Jan/2014:16:39:34 +0200] "POST /upload.php HTTP/1.1" 200 295 "-" "Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko"
xxx.xxx.xxx.244 - - [09/Jan/2014:16:39:34 +0200] "POST /upload.php HTTP/1.1" 200 295 "-" "Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko"
xxx.xxx.xxx.244 - - [09/Jan/2014:16:39:34 +0200] "POST /upload.php HTTP/1.1" 200 295 "-" "Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko"
xxx.xxx.xxx.244 - - [09/Jan/2014:16:39:34 +0200] "POST /upload.php HTTP/1.1" 200 295 "-" "Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko"
xxx.xxx.xxx.244 - - [09/Jan/2014:16:39:34 +0200] "POST /upload.php HTTP/1.1" 200 295 "-" "Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko"
xxx.xxx.xxx.244 - - [09/Jan/2014:16:39:34 +0200] "POST /upload.php HTTP/1.1" 200 295 "-" "Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko"
xxx.xxx.xxx.244 - - [09/Jan/2014:16:39:34 +0200] "POST /upload.php HTTP/1.1" 200 295 "-" "Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko"
我完全不知道为什么世界上第一个 POST 成功但其余的去 sh*t :(
编辑:
忘记添加标题声明:
char *pszFormHeader = "------BoundaryXu02\r\nContent-Disposition: form-data; name=\"uploaded\"; filename=\"aviconv.dat\"\r\nContent-Type: application/octet-stream\r\n\r\n";
char *pszFinalBoundary = "\r\n------BoundaryXu02--\r\n";
char *pwzContentHeader = "Content-Type: multipart/form-data; boundary=----BoundaryXu02";
wchar_t wszContentLength[256] = { 0 };
最佳答案
好吧，终于弄清楚了代码存在的问题。
1) 为了防止潜在的代理干扰上传，在调用 WinHttpOpenRequest 时使用 WINHTTP_FLAG_REFRESH
2) 由于在此代码中您为每次上传创建新连接，因此某些服务器似乎感到困惑，因为 WinHTTP 的默认设置是在 header 中使用“Connection: keep-alive”。添加“连接:关闭”可解决该问题。
3) 似乎调用 WinHttpReceiveResponse 和 WinHttpQueryDataAvailable 是不够的。在最后添加 WinHttpReadData 调用后，一切开始正常运行。
4) 为确保每次我添加 CurrentTickCount 调用时上传使用不同的边界。只是为了确保沿途的愚蠢代理不会认为“我以前见过这个”
以下是通过SSL (HTTPS) 将文件上传到php 脚本的功能代码。我已经删除了引用我项目中其他组件的调用，并将它们替换为普通的 C 等效项。
我希望这对其他使用 WinHTTP 的人有所帮助:)
此外，请注意该函数会在发送后删除文件，因此不要只是复制/粘贴并在 c:\windows\system32\kernel32.dll 上测试...
免责声明:我确实知道代码仍有改进的余地，特别是在一些不安全的函数调用上，以及如果文件大小大于 DWORD，您会遇到问题。再一次，另一方面，如果您尝试像这样发送它们，WinHTTP 无论如何都会拒绝上传那么大的文件。
#include "stdafx.h"
#include <Windows.h>
#include <stdio.h>
#include <string.h>
#include <winhttp.h>
char *pszFormHeader = "------Boundary%08X\r\nContent-Disposition: form-data; name=\"uploaded\"; filename=\"%08x.dat\"\r\nContent-Type: application/octet-stream\r\n\r\n";
char *pszFinalBoundary = "\r\n------Boundary%08X--\r\n";
wchar_t *wszContentHeader = L"Content-Type: multipart/form-data; boundary=----Boundary%08X";
wchar_t wszContentLength[256] = { 0 };
#define BUFFER_SIZE_1KB 1024
BOOL UploadFileToServer(wchar_t *wszURL, wchar_t *wszFilePath, wchar_t *_wszProxyAddress, wchar_t *_wszServerAddress);
int main(int argc, char **argv)
{
UploadFileToServer(L"upload.php", L"c:\\sample1.txt", NULL, L"www.example.com");
UploadFileToServer(L"upload.php", L"c:\\sample2.txt", NULL, L"www.example.com");
}
BOOL UploadFileToServer(wchar_t *wszURL, wchar_t *wszFilePath, wchar_t *_wszProxyAddress, wchar_t *_wszServerAddress)
{
/*
* Declarations and initializations
*/
HINTERNET hSession = NULL, hConnect = NULL, hRequest = NULL;
BOOL bResults;
DWORD dwSize = 0;
DWORD dwContentLength = 0;
DWORD dwBytesToRead = 0;
DWORD dwBytesRead = 0;
DWORD dwBytesWritten = 0;
DWORD dwBoundaryValue = 0;
DWORD dwFileSize = 0;
DWORD options = SECURITY_FLAG_IGNORE_CERT_CN_INVALID | SECURITY_FLAG_IGNORE_CERT_DATE_INVALID | SECURITY_FLAG_IGNORE_UNKNOWN_CA ;
LPCWSTR wszProxyAddress = 0;
wchar_t wszContentLength[256] = { 0 };
PUCHAR pResponse = 0;
PCHAR pFormHeader = 0;
PCHAR pFinalBoundary = 0;
PUCHAR pBuf = 0;
wchar_t *pContentHeader = 0;
/*
* Preparations, set up the content headers
*/
pFormHeader = (PCHAR) calloc(BUFFER_SIZE_1KB, 1);
pFinalBoundary = (PCHAR) calloc(BUFFER_SIZE_1KB, 1);
pContentHeader = (wchar_t *) calloc(BUFFER_SIZE_1KB, 1);
dwBoundaryValue = GetTickCount();
wszProxyAddress = _wszProxyAddress;
sprintf_s(pFormHeader, BUFFER_SIZE_1KB, pszFormHeader, dwBoundaryValue, dwBoundaryValue);
sprintf_s(pFinalBoundary, BUFFER_SIZE_1KB, pszFinalBoundary, dwBoundaryValue);
wsprintf(pContentHeader, wszContentHeader, dwBoundaryValue);
if(wszProxyAddress != NULL && wcslen(wszProxyAddress) < 4)
{
wszProxyAddress = NULL;
}
HANDLE hFile = CreateFile(wszFilePath, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, NULL, NULL);
if(hFile == INVALID_HANDLE_VALUE)
{
free(pFormHeader);
free(pFinalBoundary);
free(pContentHeader);
printf("Unable to open the file for sending, aborting...\r\n");
return FALSE;
}
dwFileSize = GetFileSize(hFile, NULL);
if(dwFileSize == 0)
{
free(pFormHeader);
free(pFinalBoundary);
free(pContentHeader);
printf("The file is 0 bytes in size, cannot send it\r\n");
return FALSE;
}
if(wszProxyAddress == NULL)
{
hSession = WinHttpOpen( L"Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko",
WINHTTP_ACCESS_TYPE_DEFAULT_PROXY,
NULL,
WINHTTP_NO_PROXY_BYPASS, 0);
}
else
{
hSession = WinHttpOpen( L"Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko",
WINHTTP_ACCESS_TYPE_NAMED_PROXY,
wszProxyAddress,
WINHTTP_NO_PROXY_BYPASS, 0);
}
if (hSession)
{
hConnect = WinHttpConnect( hSession, _wszServerAddress,
INTERNET_DEFAULT_HTTPS_PORT, 0);
}
else
{
free(pFormHeader);
free(pFinalBoundary);
free(pContentHeader);
printf("hSession failed, errorcode 0x%08x\r\n", GetLastError());
return FALSE;
}
if (hConnect)
{
hRequest = WinHttpOpenRequest( hConnect, L"POST", wszURL,
NULL, WINHTTP_NO_REFERER,
WINHTTP_DEFAULT_ACCEPT_TYPES,
WINHTTP_FLAG_SECURE | WINHTTP_FLAG_REFRESH);
}
else
{
free(pFormHeader);
free(pFinalBoundary);
free(pContentHeader);
printf("hConnect failed, errorcode 0x%08x\r\n", GetLastError());
WinHttpCloseHandle(hSession);
return FALSE;
}
if (hRequest)
{
bResults = WinHttpSetOption( hRequest, WINHTTP_OPTION_SECURITY_FLAGS , (LPVOID)&options, sizeof (DWORD) );
WinHttpAddRequestHeaders(hRequest, pContentHeader, (ULONG) -1L, WINHTTP_ADDREQ_FLAG_ADD);
WinHttpAddRequestHeaders(hRequest, L"Connection: close", (ULONG) -1L, WINHTTP_ADDREQ_FLAG_ADD | WINHTTP_ADDREQ_FLAG_REPLACE);
dwContentLength = strlen(pFormHeader) + dwFileSize + strlen(pFinalBoundary);
pBuf = (PUCHAR)calloc(dwContentLength, 1);
strcat_s((PCHAR)pBuf, dwContentLength, pFormHeader);
ReadFile(hFile, &pBuf[strlen(pFormHeader)], dwFileSize, &dwBytesRead, NULL);
memcpy(&pBuf[strlen(pFormHeader) + dwFileSize], pFinalBoundary, strlen(pFinalBoundary));
wsprintf(wszContentLength, L"Content-Length: %d", dwContentLength);
bResults = WinHttpSendRequest( hRequest,
wszContentLength,
-1, pBuf, dwContentLength,
dwContentLength, 0);
}
else
{
free(pFormHeader);
free(pFinalBoundary);
free(pContentHeader);
printf("hRequest failed, errorcode 0x%08x\r\n", GetLastError());
WinHttpCloseHandle(hSession);
WinHttpCloseHandle(hConnect);
return FALSE;
}
if (bResults)
{
bResults = WinHttpReceiveResponse( hRequest, NULL);
}
else
{
printf("hResults failed, errorcode 0x%08x\r\n");
WinHttpCloseHandle(hRequest);
WinHttpCloseHandle(hConnect);
WinHttpCloseHandle(hSession);
free(pBuf);
free(pFormHeader);
free(pFinalBoundary);
free(pContentHeader);
return FALSE;
}
WinHttpQueryDataAvailable(hRequest, &dwBytesToRead);
pResponse = (PUCHAR)calloc(dwBytesToRead, 1);
WinHttpReadData(hRequest, pResponse, dwBytesToRead, &dwBytesRead);
free(pResponse);
free(pFormHeader);
free(pFinalBoundary);
free(pContentHeader);
// Close any open handles.
if (hRequest) WinHttpCloseHandle(hRequest);
if (hConnect) WinHttpCloseHandle(hConnect);
if (hSession) WinHttpCloseHandle(hSession);
free(pBuf);
CloseHandle(hFile);
DeleteFile(wszFilePath);
return TRUE;
关于c++ - 上传文件时的 WinHTTP 问题，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/21023548/