[英]Content-Type tag incorrect when uploading file to s3 using the AWS c++ interface
[英]How to add correct Content-Type when uploading file with Wininet? (HTTP PUT)
我正在使用Wininet将文件上传到使用HTTP PUT的Sharepoint服务器。 但是,即使指定扩展名为.xlsx
的文件名,我在Sharepoint服务器上也得到了一个名为.xlsx
的文件,但下载时却获得了.zip
扩展名。 另外,在Sharepoint上,该文件旁边没有显示Excel小图标,而是一个更通用的图标。 我尝试了将Content-type(“ mime-type”)与HttpAddRequestHeaders一起设置的所有组合,并且在HttpSendRequest上可以提出。
下面的代码上传了文件,但是Sharepoint的内容类型错误:
static int upload_file_to_sharepoint(LPCSTR filename, LPCSTR server, LPCSTR location)
{
HINTERNET hIntrn = InternetOpenA(
"magic",
INTERNET_OPEN_TYPE_PRECONFIG_WITH_NO_AUTOPROXY,
NULL,
NULL,
0
);
if (!hIntrn)
return printf("No Internet connection: %li.\n", GetLastError());
HINTERNET hConn = InternetConnectA(
hIntrn,
server,
INTERNET_DEFAULT_HTTPS_PORT,
NULL,
NULL,
INTERNET_SERVICE_HTTP,
0,
NULL
);
if (!hConn)
return printf("Connection to update server failed: %li.\n", GetLastError());
DWORD dwOpenRequestFlags =
INTERNET_FLAG_KEEP_CONNECTION |
INTERNET_FLAG_NO_COOKIES |
INTERNET_FLAG_NO_CACHE_WRITE |
INTERNET_FLAG_NO_UI |
INTERNET_FLAG_RELOAD;
PCSTR rgpszAcceptTypes[] = {
"text/*",
"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
NULL
};
HINTERNET hReq = HttpOpenRequestA(
hConn,
"PUT",
location,
"HTTP/1.1",
NULL,
rgpszAcceptTypes,
dwOpenRequestFlags,
NULL
);
HANDLE hFile = CreateFileA(
filename,
GENERIC_READ,
FILE_SHARE_READ,
NULL,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
NULL
);
if (NULL == hFile) {
ExitProcess(1);
}
HANDLE hMap = CreateFileMapping(hFile, NULL, PAGE_READONLY, 0, 0, NULL);
if (NULL == hMap) {
ExitProcess(1);
}
LPVOID lpvFile = MapViewOfFile(hMap, FILE_MAP_READ, 0, 0, 0);
DWORD dwFileSize = GetFileSize(hFile, NULL);
CHAR mimetype[1024];
sprintf(
mimetype,
"Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"
//"Content-Type: application/vnd.ms-excel\r\n"
);
if (!HttpAddRequestHeadersA(hReq, mimetype, -1, HTTP_ADDREQ_FLAG_REPLACE)) {
printf("Failed adding mime header\n");
}
if (!HttpSendRequestA(
hReq,
NULL,// "Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
0, //-1,
lpvFile,
dwFileSize)) {
printf("HttpSendRequest failed: %li.\n", GetLastError());
}
UnmapViewOfFile(lpvFile);
CloseHandle(hMap);
CloseHandle(hFile);
printf("Uploaded file to http://%s%s\n", server, location);
return 0;
}
我用Fiddler捕获了标题,得到了:
PUT http://x.com/CENSORED/a.xslx HTTP/1.1
Accept: text/*, application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
Content-Disposition: attachment; filename="a.xlsx"
Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
User-Agent: magic
Host: censored
Content-Length: 772303
Connection: Keep-Alive
Pragma: no-cache
HTTP/1.1 200 OK
Cache-Control: private,max-age=0
Content-Length: 0
Expires: Tue, 15 Sep 2015 08:43:16 GMT
Last-Modified: Wed, 30 Sep 2015 08:43:16 GMT
ETag: "{0DC262D0-83AE-489A-90CD-EB23B284A3B3},14"
Server: Microsoft-IIS/7.5
SPRequestGuid: 6aba173e-41db-4b14-b7df-7714c54db282
X-SharePointHealthScore: 0
ResourceTag: rt:0DC262D0-83AE-489A-90CD-EB23B284A3B3@00000000014
Public-Extension: http://schemas.microsoft.com/repl-2
X-Powered-By: ASP.NET
MicrosoftSharePointTeamServices: 14.0.0.7145
X-MS-InvokeApp: 1; RequireReadOnly
ServerName: Xcensored
Date: Wed, 30 Sep 2015 08:43:16 GMT
因此,如果您将文件上传为.xlsx
而不是.xslx
,则会有所帮助...
该代码现在可以正常工作,看起来像这样,不需要特殊的标头,这与我在网上找到的其他示例是一致的:
static int upload_file_to_sharepoint(LPCSTR filename, LPCSTR server, LPCSTR location)
{
HINTERNET hIntrn = InternetOpenA(
"magic",
INTERNET_OPEN_TYPE_PRECONFIG_WITH_NO_AUTOPROXY,
NULL,
NULL,
0
);
if (!hIntrn)
return printf("No Internet connection: %li.\n", GetLastError());
HINTERNET hConn = InternetConnectA(
hIntrn,
server,
INTERNET_DEFAULT_HTTPS_PORT,
NULL,
NULL,
INTERNET_SERVICE_HTTP,
0,
NULL
);
if (!hConn)
return printf("Connection to update server failed: %li.\n", GetLastError());
DWORD dwOpenRequestFlags =
INTERNET_FLAG_KEEP_CONNECTION |
INTERNET_FLAG_NO_COOKIES |
INTERNET_FLAG_NO_CACHE_WRITE |
INTERNET_FLAG_NO_UI |
INTERNET_FLAG_RELOAD;
HINTERNET hReq = HttpOpenRequestA(
hConn,
"PUT",
location,
"HTTP/1.1",
NULL,
NULL,
dwOpenRequestFlags,
NULL
);
HANDLE hFile = CreateFileA(
filename,
GENERIC_READ,
FILE_SHARE_READ,
NULL,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
NULL
);
if (NULL == hFile) {
ExitProcess(1);
}
HANDLE hMap = CreateFileMapping(hFile, NULL, PAGE_READONLY, 0, 0, NULL);
if (NULL == hMap) {
ExitProcess(1);
}
LPVOID lpvFile = MapViewOfFile(hMap, FILE_MAP_READ, 0, 0, 0);
DWORD dwFileSize = GetFileSize(hFile, NULL);
if (!HttpSendRequestA(
hReq,
NULL,
0,
lpvFile,
dwFileSize)) {
printf("HttpSendRequest failed: %li.\n", GetLastError());
}
UnmapViewOfFile(lpvFile);
CloseHandle(hMap);
CloseHandle(hFile);
printf("Uploaded file to http://%s%s\n", server, location);
return 0;
}
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