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#include <HttpClient.h>
#include <BRegex.h>
#include <CopyJob.h>
#include <ReadJob.h>
t_headers no_headers;
HttpClient::HttpClient(const String & _url, Handle * _out, const String & _fake_host, t_headers _headers) : url(_url), out(_out), fake_host(_fake_host), headers(_headers), host(""), uri("") {
DecodeURL();
Client.SetNonBlock();
Client.Connect(host, 80);
if (Client.IsConnected()) {
SetBurst();
} else {
WaitFor(&Client, W4_WRITING);
}
}
HttpClient::~HttpClient() {
}
int HttpClient::Do() throw (GeneralException) {
t_headers::iterator i;
String t;
int l;
Regex h_reply("^HTTP/1.1 ");
Regex chunked_header("^Transfer-Encoding: chunked$");
switch (current) {
case 0:
if (Client.IsConnecting()) {
Client.FinalizeConnect();
}
if (!Client.IsConnected()) {
return TASK_DONE;
}
current = 1;
case 1:
b << "GET " + uri + " HTTP/1.1\r\n"
"Host: " + (fake_host == "" ? host : fake_host) + "\r\n"
"Connection: close\r\n";
for (i = headers.begin(); i != headers.end(); i++) {
b << *i + "\r\n";
}
b << "\r\n";
c = new CopyJob(&b, &Client);
WaitFor(c);
current = 2;
Suspend(TASK_ON_HOLD);
case 2:
delete c;
c = new ReadJob(&Client, &b);
WaitFor(c);
current = 3;
Suspend(TASK_ON_HOLD);
case 3:
delete c;
b >> t;
if (!h_reply.Match(t)) {
http_code = 0;
status = "Invalid answer from HTTP server.";
return TASK_DONE;
}
reply = t.extract(9);
chunked = false;
while (t.strlen()) {
b >> t;
reply_headers.push_back(t);
if (chunked_header.Match(t)) {
chunked = true;
}
}
http_code = reply.to_int();
if (http_code != 200) {
status = "Reply code != 200.";
return TASK_DONE;
}
status = "Downloading.";
if (!chunked) {
current = 6;
c = new CopyJob(&Client, out);
WaitFor(c);
Suspend(TASK_ON_HOLD);
}
c = 0;
case 4:
if (c)
delete c;
c = new ReadJob(&Client, &b, any);
WaitFor(c);
current = 5;
Suspend(TASK_ON_HOLD);
case 5:
delete c;
b >> t;
if (t.strlen() == 0) {
current = 4;
c = 0;
Suspend(TASK_BURST);
}
l = t.to_int("%x");
if (l == 0) {
status = "Downloaded.";
return TASK_DONE;
}
c = new CopyJob(&Client, out, l);
WaitFor(c);
current = 4;
Suspend(TASK_ON_HOLD);
case 6:
delete c;
status = "Downloaded.";
return TASK_DONE;
}
return TASK_ON_HOLD;
}
String HttpClient::GetStatus() {
return status;
}
void HttpClient::DecodeURL() throw (GeneralException) {
int p;
static const Regex isURLValid("^http://[^/]");
if (!isURLValid.Match(url))
throw GeneralException("Invalid URL.");
String tmp = url.extract(7);
p = tmp.strchr('/');
if (p < 0) {
host = tmp;
return;
}
host = tmp.extract(0, p - 1);
uri = tmp.extract(p);
}
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