我想使用WinInet在Delphi 2010中发送HTTP Post请求,但我的脚本不起作用; /
这是我的Delphi脚本:
uses WinInet;
procedure TForm1.Button1Click(Sender: TObject);
var
hNet,hURL,hRequest: HINTERNET;
begin
hNet := InternetOpen(PChar('User Agent'),INTERNET_OPEN_TYPE_PRECONFIG or INTERNET_OPEN_TYPE_PRECONFIG, nil, nil, 0);
if Assigned(hNet) then
begin
try
hURL := InternetConnect(hNet,PChar('http://localhost/delphitest.php'),INTERNET_DEFAULT_HTTP_PORT,nil,nil,INTERNET_SERVICE_HTTP,0,DWORD(0));
if(hURL<>nil) then
hRequest := HttpOpenRequest(hURL, 'POST', PChar('test=test'),'HTTP/1.0',PChar(''), nil, INTERNET_FLAG_RELOAD or INTERNET_FLAG_PRAGMA_NOCACHE,0);
if(hRequest<>nil) then
HttpSendRequest(hRequest, nil, 0, nil, 0);
InternetCloseHandle(hNet);
except
ShowMessage('error');
end
end;
end;
和我的PHP脚本:
$data = $_POST['test'];
$file = "test.txt";
$fp = fopen($file, "a");
flock($fp, 2);
fwrite($fp, $data);
flock($fp, 3);
fclose($fp);
答案 0 :(得分:16)
主要问题:
InternetConnect
的第二个参数应该只包含服务器的名称,而不是服务器端脚本的整个URL。
HttpOpenRequest
的第三个参数应该是脚本的文件名(URL),而不是POST数据!
实际的POST数据应该是HttpSendRequest
的第四个参数。
次要问题
INTERNET_OPEN_TYPE_PRECONFIG or INTERNET_OPEN_TYPE_PRECONFIG
:INTERNET_OPEN_TYPE_PRECONFIG
就足够了。
DWORD(0)
有点矫枉过正。 0
就够了。
示例代码
我使用以下代码来发布数据:
procedure WebPostData(const UserAgent: string; const Server: string; const Resource: string; const Data: AnsiString); overload;
var
hInet: HINTERNET;
hHTTP: HINTERNET;
hReq: HINTERNET;
const
accept: packed array[0..1] of LPWSTR = (PChar('*/*'), nil);
header: string = 'Content-Type: application/x-www-form-urlencoded';
begin
hInet := InternetOpen(PChar(UserAgent), INTERNET_OPEN_TYPE_PRECONFIG, nil, nil, 0);
try
hHTTP := InternetConnect(hInet, PChar(Server), INTERNET_DEFAULT_HTTP_PORT, nil, nil, INTERNET_SERVICE_HTTP, 0, 1);
try
hReq := HttpOpenRequest(hHTTP, PChar('POST'), PChar(Resource), nil, nil, @accept, 0, 1);
try
if not HttpSendRequest(hReq, PChar(header), length(header), PChar(Data), length(Data)) then
raise Exception.Create('HttpOpenRequest failed. ' + SysErrorMessage(GetLastError));
finally
InternetCloseHandle(hReq);
end;
finally
InternetCloseHandle(hHTTP);
end;
finally
InternetCloseHandle(hInet);
end;
end;
例如:
WebPostData('My UserAgent', 'www.rejbrand.se', 'mydir/myscript.asp', 'value=5');
更新以回应OP的回答
要从Internet读取数据,请使用InternetReadFile
功能。我使用以下代码从Internet读取一个小的(一行)文本文件:
function WebGetData(const UserAgent: string; const Server: string; const Resource: string): string;
var
hInet: HINTERNET;
hURL: HINTERNET;
Buffer: array[0..1023] of AnsiChar;
i, BufferLen: cardinal;
begin
result := '';
hInet := InternetOpen(PChar(UserAgent), INTERNET_OPEN_TYPE_PRECONFIG, nil, nil, 0);
try
hURL := InternetOpenUrl(hInet, PChar('http://' + Server + Resource), nil, 0, 0, 0);
try
repeat
InternetReadFile(hURL, @Buffer, SizeOf(Buffer), BufferLen);
if BufferLen = SizeOf(Buffer) then
result := result + AnsiString(Buffer)
else if BufferLen > 0 then
for i := 0 to BufferLen - 1 do
result := result + Buffer[i];
until BufferLen = 0;
finally
InternetCloseHandle(hURL);
end;
finally
InternetCloseHandle(hInet);
end;
end;
样本用法:
WebGetData('My UserAgent', 'www.rejbrand.se', '/MyDir/update/ver.txt')
此功能因此只读取数据,没有事先POST。但是,InternetReadFile
函数也可以与HttpOpenRequest
创建的句柄一起使用,因此它也适用于您的情况。你知道 WinInet引用是MSDN,对吧?这里详细描述了所有Windows API函数,例如InternetReadFile。
答案 1 :(得分:2)
var
BufferIn : INTERNET_BUFFERS;
Buffer: array[0..1024] of Byte;
FTmp: TSomeStream:
FURL: string;
...
begin
... // Create FTmp, set FUrl, ...
NetHandle := InternetOpen( 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.3) Gecko/20090824 Firefox/3.5.3',
INTERNET_OPEN_TYPE_PRECONFIG, nil, nil, 0);
UrlHandle := HttpOpenRequest(NetHandle, 'POST', PChar(FURL), nil, nil, nil, INTERNET_FLAG_NO_CACHE_WRITE, 0);
... // Check handles, etc
try
BufferIn.dwBufferTotal := FTmp.Size;
if not HttpSendRequestEx(UrlHandle, @BufferIn, nil, 0, 0) then
raise Exception.CreateFmt('Error on HttpSendRequestEx %d\n', [GetLastError()]);
size := FTmp.Read(Buffer, 1024);
InternetWriteFile(UrlHandle, @Buffer, size, BytesWritten);
while (BytesWritten = size) and (BytesWritten > 0) do
begin
size := FTmp.Read(Buffer, 1024);
InternetWriteFile(UrlHandle, @Buffer, size, BytesWritten);
end;
finally
FTmp.Free;
InternetCloseHandle(UrlHandle);
InternetCloseHandle(NetHandle);
end;
答案 2 :(得分:1)
http://www.utilmind.com上有一个库(名为&#39; Delphi 32的HTTPGet组件&#39;)。它将可视控件安装到组件面板中。 它完全符合您的要求,因此您可能需要查看。