int isValidPort(const char * str)
{
if(str == NULL)
return FALSE;
if(!isNum(str) && !isValidPortRange(str))
return FALSE;
return TRUE;
}
int HttpSocket::parseURL(CString strurl)
{
int index = strurl.Find("/",7);
/**
* Check if resource to be retrieved from
* the host is specified. Seperate the host
* or authority from the resource and http
* port specified if any.
* e.g. http://www.abc.com:8080/
* {
* Scheme : http
* Authority or host : www.abc.com
* HTTP port on host : 8080
* Resource : /
* }
*/
if(index != -1){
/**
* If the scheme http is already specified
* in the HTTP URI,then discard it and
* seperate the host and the specified
* resource.
*/
if(strurl.Find("http://",0)==-1)
host = strurl.Mid(0, index);
else
host = strurl.Mid(7, index-7);
if(host.GetLength() != 0)
resource = strurl.Mid(index);
else
{
host = strurl.Mid(7);
resource = "/";
}
}
else
{
if(strurl.Find("http://",0)==-1)
{
/** Only HTTP protocol scheme in the
* specified URI will be accepted
*/
if(strurl.Find("://",0) != -1)
{
sessionErrorCode = NonHTTPScheme;
return NonHTTPScheme;
}
host = strurl.Mid(0);
}
else
host = strurl.Mid(7);
//The default resource is /
resource = "/";
}
// If Port is present in the URI, seperate
// it from the host
if(host.Find(":") != -1)
{
setPortSpecified(true);
index = host.Find(":");
CString strPortno = host.Mid(index+1);
portNo = atoi((LPCSTR)strPortno);
if(isValidPortRange(portNo)==false)
{
sessionErrorCode = InvalidHTTPPortNo;
return sessionErrorCode;
}
host = host.Mid(0, index);
}
return 0;
}
/**
* Formulate the Http Request and send it.
* Read the response for meta-information and parse the Server Configuration information.
* Params : URL , port no and the method (HEAD or GET)
*/
int HttpSocket::sendHttpRequest(HttpParams *hq)
{
CString strurl, useragent, httpRequest;
HTTP_METHOD method;
CONN_TYPE connType;
int port=0, proxyport=0;
char strPortno[6] = {0};
strurl = hq->getURI();
method = hq->getHttpMethod();
useragent = hq->getUserAgent();
connType = hq->getConnType();
port = hq->getHttpPort();
if((sessionErrorCode = parseURL(strurl)) != 0)
return sessionErrorCode;
/** If the port is specified in the URI
* that gets the priority over what is
* specified in the HTTP port edit box.
*/
if(isPortSpecified()==true)
port = portNo;
else
portNo = port;
/** If the port is not specified by the
* user in the HTTP port edit control
* then use the default port 80
*/
if(isValidPortRange(port)==false)
{
sessionErrorCode = InvalidHTTPPortNo;
return sessionErrorCode;
}
/** Construct the HTTP request to be sent to the
* HTTP Server.
*/
if(method == HEAD)
httpRequest = "HEAD ";
else
httpRequest = "GET ";
/** If the HTTP connection is through the proxy, the
* absolute URI of the resource requested needs to
* be send as a parmeter of the HTTP method in HTTP
* header.
*/
if(connType == THRU_PROXY)
{
/** The resource with http port needs to be given
* as specified in the requested URI.
*/
if(isPortSpecified()==true)
{
itoa(port,strPortno,10);
httpRequest = httpRequest + scheme + host + ":" + CString(strPortno) + resource + " HTTP/1.1\r\n";
}
else
httpRequest = httpRequest + scheme + host + resource + " HTTP/1.1\r\n";
}
else
httpRequest = httpRequest + resource + " HTTP/1.1\r\n";
httpRequest = httpRequest + "Host: " + host + "\r\n";
httpRequest = httpRequest + "User-Agent: " + useragent + "\r\n";
httpRequest = httpRequest + "Accept: */*\r\n";
httpRequest = httpRequest + "Accept-Language: en-us,en;q=0.5\r\n";
httpRequest = httpRequest + "Connection: close\r\n" + "\r\n";
struct sockaddr_in hostaddr;
/**
* If connection is through HTTP Proxy then
* TCP connection should be established with
* it and then then HTTP requset needs to be
* sent on the connection.
*/
if(connType == THRU_PROXY)
{
if(getHostAddr(hq->getProxyIP(),hostaddr) != 0)
{
return sessionErrorCode;
}
hostaddr.sin_port = htons(hq->getProxyPort());
}
else
{
/** Connect to the host HTTP Server on the
* specified port no
*/
if(getHostAddr((LPCSTR)host,hostaddr) != 0)
{
return sessionErrorCode;
}
hostaddr.sin_port = htons(portNo);
}
if(connect(sock, (struct sockaddr *)&hostaddr, sizeof(hostaddr)) == SOCKET_ERROR)
{
if(connType == THRU_PROXY)
sessionErrorCode = HTTPProxyConnErr;
else
sessionErrorCode = HTTPSrvrConnErr;
return sessionErrorCode;
}
// Send an HTTP request to the host at the specified port no
int writtenBytes = send(sock, (LPCSTR) httpRequest, httpRequest.GetLength(),0);
int readBytes = 0;
memset(strHttpResponse,0,RESLEN); // Clear the receive buffer
if(writtenBytes <=0)
{
sessionErrorCode = ZeroBytesSent;
return sessionErrorCode;
}
if(IsSocketReadible(sock)) {
readBytes = recvfrom(sock, strHttpResponse, RESLEN-1, 0, 0, 0);
if(readBytes > 0) {
strHttpResponse[readBytes] = '\0';
}
}
return 0;
}
