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Copy pathhttp.cpp
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366 lines (274 loc) · 7.24 KB
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/*
This file is part of libswirl
*/
#include "license/bsd"
#include "types.h"
#define TRUE 1
#define FALSE 0
#include "http.h"
#include <sstream>
#include <iomanip>
#include <cctype>
#define HTTP_NATIVE (!defined(BUILD_HAS_CURL) || !BUILD_HAS_CURL)
#define HTTP_LIBCURL (defined(BUILD_HAS_CURL) && BUILD_HAS_CURL)
#if HTTP_NATIVE
#if HOST_OS == OS_LINUX || HOST_OS == OS_DARWIN
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>
#include <netdb.h>
#include <unistd.h>
#else
#include <windows.h>
#pragma comment (lib, "wsock32.lib")
#endif
size_t HTTP(HTTP_METHOD method, string url, size_t offs, size_t len, std::function<bool(void* data, size_t len)> cb)
{
if (url.substr(0,7) != "http://")
return 0;
url = url.substr(7);
auto host_end = url.find_first_of(":/", 0, 2);
string host = url.substr(0, host_end);
url = url.substr(host_end);
int port = 80;
if (url[0] == ':') {
auto port_end = url.find_first_of('/');
auto port_str = url.substr(0, port_end);
port = atoi(port_str.c_str());
url = url.substr(port_end);
}
string path = url;
string request;
string response;
struct sockaddr_in serveraddr;
int sock;
std::stringstream request2;
//printf("HTTP: %d\n", method);
if (method == HM_GET)
{
request2 << "GET " << path << " HTTP/1.1"<<endl;
request2 << "User-Agent: reicastdc" << endl;
request2 << "Host: " << host << endl;
request2 << "Accept: */*" << endl;
if (offs != 0 || len != 0)
{
//printf("HTTP: Range Request");
request2 << "Range: bytes=" << offs << "-" << (offs + len-1) << endl;
}
request2 << endl;
}
else if (method == HM_HEAD)
{
verify(offs == 0 && len == 0);
request2 << "HEAD " << path << " HTTP/1.1"<<endl;
request2 << "User-Agent: reicastdc" << endl;
request2 << "Host: " << host << endl;
request2 << endl;
}
else
{
die("HTTP: Unsupported method\n");
}
request = request2.str();
//init winsock
static bool init = false;
if (!init) {
#if HOST_OS == OS_WINDOWS
static WSADATA wsaData;
if (WSAStartup(MAKEWORD(2, 0), &wsaData) != 0)
die("WSAStartup fail");
#endif
init = true;
}
// resolve the ip address
auto host_ip = gethostbyname(host.c_str());
if (!host_ip)
return 0;
//open socket
if ((sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)
return 0;
//connect
memset(&serveraddr, 0, sizeof(serveraddr));
serveraddr.sin_family = AF_INET;
serveraddr.sin_addr.s_addr = *(int*)host_ip->h_addr_list[0];
serveraddr.sin_port = htons((unsigned short) port);
if (connect(sock, (struct sockaddr *) &serveraddr, sizeof(serveraddr)) < 0)
return 0;
#if HOST_OS == OS_WINDOWS
BOOL v = TRUE;
#else
int v = 1;
#endif
setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (const char*)&v, sizeof(v));
//send request
if (send(sock, request.c_str(), request.length(), 0) != request.length())
return 0;
/*
//get response
response = "";
resp_leng= BUFFERSIZE;
*/
/*
parse headers ..
*/
int content_length = 0;
size_t rv = 0;
for (;;) {
stringstream ss;
for (;;) {
char t;
if (recv(sock, &t, 1, 0) <= 0)
goto _cleanup;
if (t != '\n'){
ss << t;
continue;
}
string ln = ss.str();
if (ln.size() == 1)
goto _data;
string CL = "Content-Length:";
if (ln.substr(0, CL.size()) == CL) {
sscanf(ln.substr(CL.size(), ln.npos).c_str(),"%d", &content_length);
}
break;
}
}
_data:
if (len == 0)
{
rv = content_length;
}
else
{
//printf("%d vs %d\n", len, content_length);
verify(len == content_length); //crash is a bit too harsh here perhaps?
u32 chunk_max = 64 * 1024;
u8* pdata = new u8[chunk_max];
do
{
u32 chunk_remaining = chunk_max;
if (chunk_remaining > len)
chunk_remaining = len;
u8* ptr = pdata;
do
{
int rcv = recv(sock, (char*)ptr, chunk_remaining, 0);
//printf("%d > %d\n", chunk_remaining, rcv);
verify(rcv >= 0);
verify(chunk_remaining > 0 && chunk_remaining>= rcv);
chunk_remaining -= rcv;
len -= rcv;
ptr += rcv;
}
while (chunk_remaining >0);
if (!cb(pdata, ptr - pdata))
break;
} while (len >0);
delete[] pdata;
rv = content_length;
}
_cleanup:
//disconnect
#if HOST_OS == OS_WINDOWS
closesocket(sock);
#else
close(sock);
#endif
/*
//cleanup
WSACleanup();
*/
return rv;
}
#elif HTTP_LIBCURL
#include <curl/curl.h>
size_t writenil(char *ptr, size_t size, size_t nmemb, void *userdata) {
return nmemb;
}
size_t writef(char *ptr, size_t size, size_t nmemb, void *userdata) {
std::function<bool(void* data, size_t len)>* cb = reinterpret_cast<std::function<bool(void* data, size_t len)>*>(userdata);
if ((*cb)) {
(*cb)(ptr, nmemb);
}
return nmemb;
}
size_t HTTP(HTTP_METHOD method, string url, size_t offs, size_t len, std::function<bool(void* data, size_t len)> cb)
{
printf("http: %d %s [%d, %d]\n", method, url.c_str(), offs, len);
struct curl_slist *chunk = NULL;
string str;
CURLcode res;
auto curl_local = unique_ptr<CURL, std::function<void(CURL*)>>(curl_easy_init(), [](CURL* f) { curl_easy_cleanup(f); });
auto curl = curl_local.get();
curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
if (offs != 0 || len != 0)
{
std::stringstream request2;
request2 << "Range: bytes=" << offs << "-" << (offs + len-1);
str = request2.str();
chunk = curl_slist_append(chunk, str.c_str());
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, chunk);
}
if (len == 0) {
curl_easy_setopt(curl, CURLOPT_HEADER, 1);
curl_easy_setopt(curl, CURLOPT_NOBODY, 1);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, nullptr);
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, writenil);
} else {
curl_easy_setopt(curl, CURLOPT_HEADER, 0);
curl_easy_setopt(curl, CURLOPT_NOBODY, 0);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, &cb);
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, writef);
}
res = curl_easy_perform(curl);
verify(res == CURLE_OK);
curl_off_t cl;
res = curl_easy_getinfo(curl, CURLINFO_CONTENT_LENGTH_DOWNLOAD_T, &cl);
verify(res == CURLE_OK);
if (len == 0) {
len = cl;
} else {
verify(len == cl);
}
if (chunk) curl_slist_free_all(chunk);
return len;
}
#endif
string url_encode(const string &value) {
ostringstream escaped;
escaped.fill('0');
escaped << hex;
for (string::const_iterator i = value.begin(), n = value.end(); i != n; ++i) {
string::value_type c = (*i);
// Keep alphanumeric and other accepted characters intact
if (isalnum(c) || c == '-' || c == '_' || c == '.' || c == '~' || c == '/' || c =='%' ) {
escaped << c;
continue;
}
// Any other characters are percent-encoded
escaped << '%' << setw(2) << int((unsigned char)c);
}
return escaped.str();
}
size_t HTTP(HTTP_METHOD method, string url, size_t offs, size_t len, void* pdata)
{
return HTTP(method, url, offs, len, [&pdata](void* data, size_t len) {
memcpy(pdata, data, len);
(u8*&)pdata += len;
return true;
});
}
string HTTP(HTTP_METHOD method, string url)
{
auto size = HTTP(HM_HEAD, url, 0, 0, (void*)nullptr);
if (size == 0)
return "";
char* data = new char[size];
auto size2 = HTTP(method, url, 0, size, data);
verify(size2 == size);
string rv = string(data);
delete[] data;
return rv;
}