问题描述
我有一个C ++应用程序，我想调用如下的链接
www.mysite.com/register.php?app=[APP_NAME]&app_ver=[VERSION]& name = [NAME]&surname = [SURNAME]&email = [EMAIL]&gender = [GENDER]&country = [COUNTRY]&language = [LANGUAGE ]
[NAME] =名字
[SURNAME] =姓氏
[EMAIL] = [email protected]
[GENDER] =男性/女性
如果成功，否则此链接显示"OK"，否则显示一些错误消息.
请告诉我如何从c ++执行此操作并检查结果.在此先谢谢您.
Hi,
I had a c++ application and I wand to call some link as below
www.mysite.com/register.php?app=[APP_NAME]&app_ver=[VERSION]& name=[NAME]&surname=[SURNAME]&email=[EMAIL]&gender=[GENDER]&country=[COUNTRY]&language=[LANGUAGE]
[NAME] = First name
[SURNAME] = Last name
[EMAIL] = [email protected]
[GENDER] = male / female
This link shows "OK" if success else shows some error message.
Please tell me how execute this from c++ and check the result. Thanks in advance.
推荐答案
#include <windows.h>
#include <string>
#include <stdio.h>
using std::string;
HINSTANCE hInst;
WSADATA wsaData;
void mParseUrl(char *mUrl, string &serverName, string &filepath, string &filename)
{
string::size_type n;
string url = mUrl;
if (url.substr(0,7) == "http://")
url.erase(0,7);
if (url.substr(0,8) == "https://")
url.erase(0,8);
n = url.find('/');
if (n != string::npos)
{
serverName = url.substr(0,n);
filepath = url.substr(n);
n = filepath.rfind('/');
filename = filepath.substr(n+1);
}
else
{
serverName = url;
filepath = "/";
filename = "";
}
}
SOCKET connectToServer(char *szServerName, WORD portNum)
{
struct hostent *hp;
unsigned int addr;
struct sockaddr_in server;
SOCKET conn;
conn = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (conn == INVALID_SOCKET)
return NULL;
if(inet_addr(szServerName)==INADDR_NONE)
{
hp=gethostbyname(szServerName);
}
else
{
addr=inet_addr(szServerName);
hp=gethostbyaddr((char*)&addr,sizeof(addr),AF_INET);
}
if(hp==NULL)
{
closesocket(conn);
return NULL;
}
server.sin_addr.s_addr=*((unsigned long*)hp->h_addr);
server.sin_family=AF_INET;
server.sin_port=htons(portNum);
if(connect(conn,(struct sockaddr*)&server,sizeof(server)))
{
closesocket(conn);
return NULL;
}
return conn;
}
int getHeaderLength(char *content)
{
const char *srchStr1 = "\r\n\r\n", *srchStr2 = "\n\r\n\r";
char *findPos;
int ofset = -1;
findPos = strstr(content, srchStr1);
if (findPos != NULL)
{
ofset = findPos - content;
ofset += strlen(srchStr1);
}
else
{
findPos = strstr(content, srchStr2);
if (findPos != NULL)
{
ofset = findPos - content;
ofset += strlen(srchStr2);
}
}
return ofset;
}
char *readUrl2(char *szUrl, long &bytesReturnedOut, char **headerOut)
{
const int bufSize = 512;
char readBuffer[bufSize], sendBuffer[bufSize], tmpBuffer[bufSize];
char *tmpResult=NULL, *result;
SOCKET conn;
string server, filepath, filename;
long totalBytesRead, thisReadSize, headerLen;
mParseUrl(szUrl, server, filepath, filename);
///////////// step 1, connect //////////////////////
conn = connectToServer((char*)server.c_str(), 80);
///////////// step 2, send GET request /////////////
sprintf(tmpBuffer, "GET %s HTTP/1.0", filepath.c_str());
strcpy(sendBuffer, tmpBuffer);
strcat(sendBuffer, "\r\n");
sprintf(tmpBuffer, "Host: %s", server.c_str());
strcat(sendBuffer, tmpBuffer);
strcat(sendBuffer, "\r\n");
strcat(sendBuffer, "\r\n");
send(conn, sendBuffer, strlen(sendBuffer), 0);
// SetWindowText(edit3Hwnd, sendBuffer);
printf("Buffer being sent:\n%s", sendBuffer);
///////////// step 3 - get received bytes ////////////////
// Receive until the peer closes the connection
totalBytesRead = 0;
while(1)
{
memset(readBuffer, 0, bufSize);
thisReadSize = recv (conn, readBuffer, bufSize, 0);
if ( thisReadSize <= 0 )
break;
tmpResult = (char*)realloc(tmpResult, thisReadSize+totalBytesRead);
memcpy(tmpResult+totalBytesRead, readBuffer, thisReadSize);
totalBytesRead += thisReadSize;
}
headerLen = getHeaderLength(tmpResult);
long contenLen = totalBytesRead-headerLen;
result = new char[contenLen+1];
memcpy(result, tmpResult+headerLen, contenLen);
result[contenLen] = 0x0;
char *myTmp;
myTmp = new char[headerLen+1];
strncpy(myTmp, tmpResult, headerLen);
myTmp[headerLen] = NULL;
delete(tmpResult);
*headerOut = myTmp;
bytesReturnedOut = contenLen;
closesocket(conn);
return(result);
}
int main()
{
const int bufLen = 1024;
char *szUrl = "http://www.codeproject.com/Questions/427350/calling-a-website-from-cplusplus";
long fileSize;
char *memBuffer, *headerBuffer;
FILE *fp;
memBuffer = headerBuffer = NULL;
if ( WSAStartup(0x101, &wsaData) != 0)
return -1;
memBuffer = readUrl2(szUrl, fileSize, &headerBuffer);
printf("returned from readUrl\n");
printf("data returned:\n%s", memBuffer);
if (fileSize != 0)
{
printf("Got some data\n");
fp = fopen("downloaded.file", "wb");
fwrite(memBuffer, 1, fileSize, fp);
fclose(fp);
// SetDlgItemText(hwndDlg, IDC_EDIT4, headerBuffer);
// SetDlgItemText(hwndDlg, IDC_EDIT5, memBuffer);
delete(memBuffer);
delete(headerBuffer);
}
WSACleanup();
return 0;
}
ShellExecute(NULL, "open", "http://www.mysite.com", NULL, NULL, SW_SHOWNORMAL);
这将启动一个浏览器.如果要解析输出，则必须使用http客户端库，例如 cURL [ ^ ]下载对您的帖子的响应或获取请求，然后您必须解析该输出.
注意:如果要通过http与Web服务器通信，并且还可以对服务器进行编程(CGI或Servlet)，则可以在Web服务器内部创建一些门"，某些URL可以提供响应，而HTML页除外(例如网络服务)，例如，您的网址可以使用xml或json响应，也可以使用C ++程序易于解析的自定义文本进行响应.如果您不熟悉HTTP:呼叫您的网络服务器"意味着与服务器建立TCP连接，并发送HTTP请求( HTTP协议 [ ^ ])，然后在相同的插座.响应可以是任何东西，甚至是二进制数据，也可以由您的servlet或cgi程序从服务器内部发送.
在c ++程序的客户端，有一些库可以为您完成工作(http客户端库，如libcURL).如果不需要响应，则只需使用ShellExecute()启动具有链接的用户浏览器.
This brings up a browser. If you want to parse the output then you have to use a http client library like cURL[^] to download a response to your post or get request and then you have to parse that output.
Note: If you want to communicate with a webserver via http and you can program the server as well (cgi or servlet) then you can create some "gates" inside your webserver, some urls that give a response other then a html page (like webservices), for example your url could respond with xml or json or custom text that is easy to parse by your c++ program. If you are new to http: "Calling your webserver" means creating a tcp connection with the server, sending a HTTP request (HTTP protocol[^]), and then reading out the response on the same socket. The response can be anything, even binary data, it can be sent by your servlet or cgi program from inside the server.
There are libraries that do the job for you on the client side in your c++ program (http client libraries like libcURL). If you don''t need a response, then just start a browser for the user with the link using ShellExecute().
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