/// <summary>
/// Execute is modified Curl_http() which in Curl gets called from the generic Curl_do() function when a HTTP
/// request is to be performed. This creates and sends a properly constructed
/// HTTP request.
/// </summary>
/// <param name="curl"></param>
/// <param name="result"></param>
/// <returns></returns>
internal override object Execute(PhpCurlResource curl, ref CURLcode result)
{
UserDefined data = curl.Data;
HttpBitsUploader uploader;
bool terminatedCorrectly = false;
int redirectAttempts = 0;
bool keepVerb = false;
result = CURLcode.CURLE_OK;
if (data.Str[(int)DupString.SET_URL] == null)
{
result = CURLcode.CURLE_COULDNT_CONNECT;
return false;
}
Uri uri = Utils.CompleteUri(PhpVariable.AsString(data.Str[(int)DupString.SET_URL]),
Scheme,
data.UsePort);
for (; ; )
{
request = (HttpWebRequest)HttpWebRequest.Create(uri);
Curl_HttpReq httpreq = (redirectAttempts == 0) || keepVerb ? setRequestMethod(data) : Curl_HttpReq.GET;
setTimeOut(data);
setHttpVersion(data);
request.AllowAutoRedirect = data.FollowLocation;
request.MaximumAutomaticRedirections = data.MaxRedirects;
if (data.Str[(int)DupString.USERAGENT] != null)
request.UserAgent = PhpVariable.AsString(data.Str[(int)DupString.USERAGENT]);
if (data.Str[(int)DupString.SET_REFERER] != null)
request.Referer = PhpVariable.AsString(data.Str[(int)DupString.SET_REFERER]);
if (data.Headers != null)
request.SetHttpHeaders(data.Headers);
setProxy(data);
setCredentials(data);
setCookies(data);
//ssl.VerifyPeer && ssl.VerifyHost == 2 is supported by default .NET
// other values are currently unsupported
if (data.Str[(int)DupString.CERT] != null)
{
X509Certificate cert;
string certPath;
try
{
certPath = Path.Combine(ScriptContext.CurrentContext.WorkingDirectory, PhpVariable.AsString(data.Str[(int)DupString.SSL_CAFILE]));
if (data.Str[(int)DupString.KEY_PASSWD] == null)
cert = new X509Certificate(certPath);
else
cert = new X509Certificate(certPath, PhpVariable.AsString(data.Str[(int)DupString.KEY_PASSWD]));
request.ClientCertificates.Add(cert);
}
catch (CryptographicException)
{
//TODO: here are more caises to differentiate
result = CURLcode.CURLE_SSL_CACERT_BADFILE;
return false;
}
}
switch (httpreq)
{
case Curl_HttpReq.POST_FORM:
//same as POST but we can send multiple items asform-data
if (data.HttpPostForm != null)
{
try
{
HttpFormDataUploader formUploader = new HttpFormDataUploader(request);
formUploader.UploadForm(data.HttpPostForm);
}
catch (WebException ex)
{
switch (ex.Status)
{
case WebExceptionStatus.Timeout:
result = CURLcode.CURLE_OPERATION_TIMEOUTED;
break;
default:
result = CURLcode.CURLE_COULDNT_CONNECT;// for now just this
break;
}
return false;
}
}
break;
case Curl_HttpReq.PUT: /* Let's PUT the data to the server! */
//INFILE & INFILESIZE has to be set
NativeStream nativeStream = data.Infile as NativeStream;
if (nativeStream == null)
return false;
FileStream fs = nativeStream.RawStream as FileStream;
if (fs == null)
return false;
try
{
uploader = new HttpBitsUploader(request);
uploader.UploadFile(fs);
}
catch (WebException ex)
{
switch (ex.Status)
{
case WebExceptionStatus.Timeout:
result = CURLcode.CURLE_OPERATION_TIMEOUTED;
break;
default:
result = CURLcode.CURLE_COULDNT_CONNECT;// for now just this
break;
}
return false;
}
break;
case Curl_HttpReq.POST:
/* this is the simple POST, using x-www-form-urlencoded style */
if (String.IsNullOrEmpty(request.ContentType))// if Content-type isn't set set the default
request.ContentType = "application/x-www-form-urlencoded";
if (data.Postfields != null)
{
try
{
uploader = new HttpBitsUploader(request);
uploader.UploadData(data.Postfields);
}
catch (WebException ex)
{
switch (ex.Status)
{
case WebExceptionStatus.Timeout:
result = CURLcode.CURLE_OPERATION_TIMEOUTED;
break;
default:
result = CURLcode.CURLE_COULDNT_CONNECT;// for now just this
break;
}
return false;
}
}
break;
}
try
{
// if we got this far, we will turn off AutoRedirect (assuming it was on), since
// we are ready to handle manually following certain responses. this is needed
// to harvest cookies that are set on any intermediate response (i.e. anything
// other than the last one followed), since the .NET HTTP class will use, but
// NOT return, cookies set on anything but the last request.
request.AllowAutoRedirect = false;
response = (HttpWebResponse)request.GetResponse();
}
catch (WebException ex)
{
switch (ex.Status)
{
case WebExceptionStatus.Timeout:
result = CURLcode.CURLE_OPERATION_TIMEOUTED;
break;
case WebExceptionStatus.ConnectFailure:
result = CURLcode.CURLE_COULDNT_CONNECT;
break;
case WebExceptionStatus.TrustFailure:
result = CURLcode.CURLE_SSL_CACERT;
break;
case WebExceptionStatus.ProtocolError:
//Response from server was complete, but indicated protocol error as 404, 401 etc.
break;
default:
result = CURLcode.CURLE_COULDNT_CONNECT;// for now just this
break;
}
//TODO: other errorCodes
response = (HttpWebResponse)ex.Response;
//return false;
//error = true;
}
if (response == null)// just to make sure I have the response object
return false;
if (data.FollowLocation)
{
// see if we need to follow a redirect.
switch (response.StatusCode)
{
case HttpStatusCode.MovedPermanently:
case HttpStatusCode.Found:
case HttpStatusCode.SeeOther:
case HttpStatusCode.RedirectKeepVerb:
if (redirectAttempts++ >= data.MaxRedirects)
{
result = CURLcode.CURLE_TOO_MANY_REDIRECTS;
return false;
}
string location = response.Headers["Location"];
if (!string.IsNullOrWhiteSpace(location))
{
try
{
keepVerb = response.StatusCode == HttpStatusCode.RedirectKeepVerb;
data.Cookies.Add(response.Cookies);
response.Close();
uri = new Uri(uri, location);
continue;
}
catch (Exception)
{
// closest error code though could be confusing as it's not the user-
// submitted URL that's the problem
result = CURLcode.CURLE_URL_MALFORMAT;
return false;
}
}
break;
}
}
//Save cookies
data.Cookies.Add(response.Cookies);
// break out of the for loop as we aren't following a redirect
break;
}
byte[] headers = null;
byte[] content = null;
int headersLength = 0;
if (data.IncludeHeader)
{
//It's necessary to put HTTP header into the result
//first we need to create it since there isn't anywhere
headers = Encoding.ASCII.GetBytes(response.GetHttpHeaderAsString());
headersLength = headers.Length;
}
if (data.FunctionWriteHeader != null)// TODO: probably invoke before
{
response.InvokeHeaderFunction(curl, data.FunctionWriteHeader);
}
Stream writeStream = null;
if (data.WriteFunction != null)
{
writeStream = new WriteFunctionStream(curl, data.WriteFunction);
}
else if (data.OutFile != null)
{
var outStream = data.OutFile as PhpStream;
if (outStream == null)
return false;
Stream fs = outStream.RawStream as Stream;
if (fs == null)
return false;
writeStream = fs;
}
else if (data.ReturnTransfer == false) // Output to standart output
{
writeStream = ScriptContext.CurrentContext.OutputStream;
}
if (writeStream != null)
{
if (headers != null) //there is http header to copy to the result
{
writeStream.Write(headers, 0, headersLength);
}
HttpBitsDownloader reader = new HttpBitsDownloader(response);
try
{
reader.ReadToStream(writeStream, out terminatedCorrectly);
}
catch (WebException ex)
{
switch (ex.Status)
{
case WebExceptionStatus.Timeout:
result = CURLcode.CURLE_OPERATION_TIMEOUTED;
break;
default:
result = CURLcode.CURLE_COULDNT_CONNECT;// for now just this
break;
}
}
if (!terminatedCorrectly)
result = CURLcode.CURLE_PARTIAL_FILE;
return true;
}
else
{
// Read the response
HttpBitsDownloader reader = new HttpBitsDownloader(response);
try
{
content = reader.ReadToEnd(headersLength, out terminatedCorrectly);
}
catch(WebException ex)
{
switch (ex.Status)
{
case WebExceptionStatus.Timeout:
result = CURLcode.CURLE_OPERATION_TIMEOUTED;
break;
default:
result = CURLcode.CURLE_COULDNT_CONNECT;// for now just this
break;
}
}
if (!terminatedCorrectly)
result = CURLcode.CURLE_PARTIAL_FILE;
if (headers != null) //there is http header to copy to the result
{
if (content != null)
Buffer.BlockCopy(headers, 0, content, 0, headersLength);
else
content = headers;
}
if (content == null)
return PhpBytes.Empty;
else
return new PhpBytes(content);
}
}