mirror of
https://github.com/PurpleI2P/i2pd.git
synced 2024-10-31 09:20:38 +00:00
528 lines
14 KiB
C++
528 lines
14 KiB
C++
/*
|
|
* Copyright (c) 2013-2021, The PurpleI2P Project
|
|
*
|
|
* This file is part of Purple i2pd project and licensed under BSD3
|
|
*
|
|
* See full license text in LICENSE file at top of project tree
|
|
*/
|
|
|
|
#include <algorithm>
|
|
#include <utility>
|
|
#include <stdio.h>
|
|
#include <ctime>
|
|
#include "util.h"
|
|
#include "Base.h"
|
|
#include "HTTP.h"
|
|
|
|
namespace i2p
|
|
{
|
|
namespace http
|
|
{
|
|
const std::vector<std::string> HTTP_METHODS = {
|
|
"GET", "HEAD", "POST", "PUT", "PATCH", "DELETE", "OPTIONS", "CONNECT", // HTTP basic methods
|
|
"COPY", "LOCK", "MKCOL", "MOVE", "PROPFIND", "PROPPATCH", "UNLOCK", "SEARCH" // WebDAV methods, for SEARCH see rfc5323
|
|
};
|
|
const std::vector<std::string> HTTP_VERSIONS = {
|
|
"HTTP/1.0", "HTTP/1.1"
|
|
};
|
|
const std::vector<const char *> weekdays = {
|
|
"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
|
|
};
|
|
const std::vector<const char *> months = {
|
|
"Jan", "Feb", "Mar", "Apr", "May", "Jun",
|
|
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
|
|
};
|
|
|
|
inline bool is_http_version(const std::string & str) {
|
|
return std::find(HTTP_VERSIONS.begin(), HTTP_VERSIONS.end(), str) != std::end(HTTP_VERSIONS);
|
|
}
|
|
|
|
inline bool is_http_method(const std::string & str) {
|
|
return std::find(HTTP_METHODS.begin(), HTTP_METHODS.end(), str) != std::end(HTTP_METHODS);
|
|
}
|
|
|
|
void strsplit(const std::string & line, std::vector<std::string> &tokens, char delim, std::size_t limit = 0) {
|
|
std::size_t count = 0;
|
|
std::stringstream ss(line);
|
|
std::string token;
|
|
while (1) {
|
|
count++;
|
|
if (limit > 0 && count >= limit)
|
|
delim = '\n'; /* reset delimiter */
|
|
if (!std::getline(ss, token, delim))
|
|
break;
|
|
tokens.push_back(token);
|
|
}
|
|
}
|
|
|
|
static std::pair<std::string, std::string> parse_header_line(const std::string& line)
|
|
{
|
|
std::size_t pos = 0;
|
|
std::size_t len = 1; /*: */
|
|
std::size_t max = line.length();
|
|
if ((pos = line.find(':', pos)) == std::string::npos)
|
|
return std::make_pair("", ""); // no ':' found
|
|
if (pos + 1 < max) // ':' at the end of header is valid
|
|
{
|
|
while ((pos + len) < max && isspace(line.at(pos + len)))
|
|
len++;
|
|
if (len == 1)
|
|
return std::make_pair("", ""); // no following space, but something else
|
|
}
|
|
return std::make_pair(line.substr(0, pos), line.substr(pos + len));
|
|
}
|
|
|
|
void gen_rfc7231_date(std::string & out) {
|
|
std::time_t now = std::time(nullptr);
|
|
char buf[128];
|
|
std::tm *tm = std::gmtime(&now);
|
|
snprintf(buf, sizeof(buf), "%s, %02d %s %d %02d:%02d:%02d GMT",
|
|
weekdays[tm->tm_wday], tm->tm_mday, months[tm->tm_mon],
|
|
tm->tm_year + 1900, tm->tm_hour, tm->tm_min, tm->tm_sec
|
|
);
|
|
out = buf;
|
|
}
|
|
|
|
bool URL::parse(const char *str, std::size_t len) {
|
|
std::string url(str, len ? len : strlen(str));
|
|
return parse(url);
|
|
}
|
|
|
|
bool URL::parse(const std::string& url) {
|
|
std::size_t pos_p = 0; /* < current parse position */
|
|
std::size_t pos_c = 0; /* < work position */
|
|
if(url.at(0) != '/' || pos_p > 0) {
|
|
std::size_t pos_s = 0;
|
|
/* schema */
|
|
pos_c = url.find("://");
|
|
if (pos_c != std::string::npos) {
|
|
schema = url.substr(0, pos_c);
|
|
pos_p = pos_c + 3;
|
|
}
|
|
/* user[:pass] */
|
|
pos_s = url.find('/', pos_p); /* find first slash */
|
|
pos_c = url.find('@', pos_p); /* find end of 'user' or 'user:pass' part */
|
|
if (pos_c != std::string::npos && (pos_s == std::string::npos || pos_s > pos_c)) {
|
|
std::size_t delim = url.find(':', pos_p);
|
|
if (delim && delim != std::string::npos && delim < pos_c) {
|
|
user = url.substr(pos_p, delim - pos_p);
|
|
delim += 1;
|
|
pass = url.substr(delim, pos_c - delim);
|
|
} else if(delim) {
|
|
user = url.substr(pos_p, pos_c - pos_p);
|
|
}
|
|
pos_p = pos_c + 1;
|
|
}
|
|
/* hostname[:port][/path] */
|
|
if (url[pos_p] == '[') // ipv6
|
|
{
|
|
auto pos_b = url.find(']', pos_p);
|
|
if (pos_b == std::string::npos) return false;
|
|
pos_c = url.find_first_of(":/", pos_b);
|
|
}
|
|
else
|
|
pos_c = url.find_first_of(":/", pos_p);
|
|
if (pos_c == std::string::npos) {
|
|
/* only hostname, without post and path */
|
|
host = url.substr(pos_p, std::string::npos);
|
|
return true;
|
|
} else if (url.at(pos_c) == ':') {
|
|
host = url.substr(pos_p, pos_c - pos_p);
|
|
/* port[/path] */
|
|
pos_p = pos_c + 1;
|
|
pos_c = url.find('/', pos_p);
|
|
std::string port_str = (pos_c == std::string::npos)
|
|
? url.substr(pos_p, std::string::npos)
|
|
: url.substr(pos_p, pos_c - pos_p);
|
|
/* stoi throws exception on failure, we don't need it */
|
|
for (char c : port_str) {
|
|
if (c < '0' || c > '9')
|
|
return false;
|
|
port *= 10;
|
|
port += c - '0';
|
|
}
|
|
if (pos_c == std::string::npos)
|
|
return true; /* no path part */
|
|
pos_p = pos_c;
|
|
} else {
|
|
/* start of path part found */
|
|
host = url.substr(pos_p, pos_c - pos_p);
|
|
pos_p = pos_c;
|
|
}
|
|
}
|
|
|
|
/* pos_p now at start of path part */
|
|
pos_c = url.find_first_of("?#", pos_p);
|
|
if (pos_c == std::string::npos) {
|
|
/* only path, without fragment and query */
|
|
path = url.substr(pos_p, std::string::npos);
|
|
return true;
|
|
} else if (url.at(pos_c) == '?') {
|
|
/* found query part */
|
|
path = url.substr(pos_p, pos_c - pos_p);
|
|
pos_p = pos_c + 1;
|
|
pos_c = url.find('#', pos_p);
|
|
if (pos_c == std::string::npos) {
|
|
/* no fragment */
|
|
query = url.substr(pos_p, std::string::npos);
|
|
return true;
|
|
} else {
|
|
query = url.substr(pos_p, pos_c - pos_p);
|
|
pos_p = pos_c + 1;
|
|
}
|
|
} else {
|
|
/* found fragment part */
|
|
path = url.substr(pos_p, pos_c - pos_p);
|
|
pos_p = pos_c + 1;
|
|
}
|
|
|
|
/* pos_p now at start of fragment part */
|
|
frag = url.substr(pos_p, std::string::npos);
|
|
return true;
|
|
}
|
|
|
|
bool URL::parse_query(std::map<std::string, std::string> & params) {
|
|
std::vector<std::string> tokens;
|
|
strsplit(query, tokens, '&');
|
|
|
|
params.clear();
|
|
for (const auto& it : tokens) {
|
|
if (!it.length()) // empty
|
|
continue;
|
|
std::size_t eq = it.find ('=');
|
|
if (eq != std::string::npos) {
|
|
auto e = std::pair<std::string, std::string>(it.substr(0, eq), it.substr(eq + 1));
|
|
params.insert(e);
|
|
} else {
|
|
auto e = std::pair<std::string, std::string>(it, "");
|
|
params.insert(e);
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
std::string URL::to_string() {
|
|
std::string out = "";
|
|
if (schema != "") {
|
|
out = schema + "://";
|
|
if (user != "" && pass != "") {
|
|
out += user + ":" + pass + "@";
|
|
} else if (user != "") {
|
|
out += user + "@";
|
|
}
|
|
if (port) {
|
|
out += host + ":" + std::to_string(port);
|
|
} else {
|
|
out += host;
|
|
}
|
|
}
|
|
out += path;
|
|
if (query != "")
|
|
out += "?" + query;
|
|
if (frag != "")
|
|
out += "#" + frag;
|
|
return out;
|
|
}
|
|
|
|
bool URL::is_i2p() const
|
|
{
|
|
return host.rfind(".i2p") == ( host.size() - 4 );
|
|
}
|
|
|
|
void HTTPMsg::add_header(const char *name, std::string & value, bool replace) {
|
|
add_header(name, value.c_str(), replace);
|
|
}
|
|
|
|
void HTTPMsg::add_header(const char *name, const char *value, bool replace) {
|
|
std::size_t count = headers.count(name);
|
|
if (count && !replace)
|
|
return;
|
|
if (count) {
|
|
headers[name] = value;
|
|
return;
|
|
}
|
|
headers.insert(std::pair<std::string, std::string>(name, value));
|
|
}
|
|
|
|
void HTTPMsg::del_header(const char *name) {
|
|
headers.erase(name);
|
|
}
|
|
|
|
int HTTPReq::parse(const char *buf, size_t len) {
|
|
std::string str(buf, len);
|
|
return parse(str);
|
|
}
|
|
|
|
int HTTPReq::parse(const std::string& str) {
|
|
enum { REQ_LINE, HEADER_LINE } expect = REQ_LINE;
|
|
std::size_t eoh = str.find(HTTP_EOH); /* request head size */
|
|
std::size_t eol = 0, pos = 0;
|
|
URL url;
|
|
|
|
if (eoh == std::string::npos)
|
|
return 0; /* str not contains complete request */
|
|
|
|
while ((eol = str.find(CRLF, pos)) != std::string::npos) {
|
|
if (expect == REQ_LINE) {
|
|
std::string line = str.substr(pos, eol - pos);
|
|
std::vector<std::string> tokens;
|
|
strsplit(line, tokens, ' ');
|
|
if (tokens.size() != 3)
|
|
return -1;
|
|
if (!is_http_method(tokens[0]))
|
|
return -1;
|
|
if (!is_http_version(tokens[2]))
|
|
return -1;
|
|
if (!url.parse(tokens[1]))
|
|
return -1;
|
|
/* all ok */
|
|
method = tokens[0];
|
|
uri = tokens[1];
|
|
version = tokens[2];
|
|
expect = HEADER_LINE;
|
|
}
|
|
else
|
|
{
|
|
std::string line = str.substr(pos, eol - pos);
|
|
auto p = parse_header_line(line);
|
|
if (p.first.length () > 0)
|
|
headers.push_back (p);
|
|
else
|
|
return -1;
|
|
}
|
|
pos = eol + strlen(CRLF);
|
|
if (pos >= eoh)
|
|
break;
|
|
}
|
|
return eoh + strlen(HTTP_EOH);
|
|
}
|
|
|
|
void HTTPReq::write(std::ostream & o)
|
|
{
|
|
o << method << " " << uri << " " << version << CRLF;
|
|
for (auto & h : headers)
|
|
o << h.first << ": " << h.second << CRLF;
|
|
o << CRLF;
|
|
}
|
|
|
|
std::string HTTPReq::to_string()
|
|
{
|
|
std::stringstream ss;
|
|
write(ss);
|
|
return ss.str();
|
|
}
|
|
|
|
void HTTPReq::AddHeader (const std::string& name, const std::string& value)
|
|
{
|
|
headers.push_back (std::make_pair(name, value));
|
|
}
|
|
|
|
void HTTPReq::UpdateHeader (const std::string& name, const std::string& value)
|
|
{
|
|
for (auto& it : headers)
|
|
if (it.first == name)
|
|
{
|
|
it.second = value;
|
|
break;
|
|
}
|
|
}
|
|
|
|
void HTTPReq::RemoveHeader (const std::string& name, const std::string& exempt)
|
|
{
|
|
for (auto it = headers.begin (); it != headers.end ();)
|
|
{
|
|
if (!it->first.compare(0, name.length (), name) && it->first != exempt)
|
|
it = headers.erase (it);
|
|
else
|
|
it++;
|
|
}
|
|
}
|
|
|
|
std::string HTTPReq::GetHeader (const std::string& name) const
|
|
{
|
|
for (auto& it : headers)
|
|
if (it.first == name)
|
|
return it.second;
|
|
return "";
|
|
}
|
|
|
|
bool HTTPRes::is_chunked() const
|
|
{
|
|
auto it = headers.find("Transfer-Encoding");
|
|
if (it == headers.end())
|
|
return false;
|
|
if (it->second.find("chunked") != std::string::npos)
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
bool HTTPRes::is_gzipped(bool includingI2PGzip) const
|
|
{
|
|
auto it = headers.find("Content-Encoding");
|
|
if (it == headers.end())
|
|
return false; /* no header */
|
|
if (it->second.find("gzip") != std::string::npos)
|
|
return true; /* gotcha! */
|
|
if (includingI2PGzip && it->second.find("x-i2p-gzip") != std::string::npos)
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
long int HTTPMsg::content_length() const
|
|
{
|
|
unsigned long int length = 0;
|
|
auto it = headers.find("Content-Length");
|
|
if (it == headers.end())
|
|
return -1;
|
|
errno = 0;
|
|
length = std::strtoul(it->second.c_str(), (char **) NULL, 10);
|
|
if (errno != 0)
|
|
return -1;
|
|
return length;
|
|
}
|
|
|
|
int HTTPRes::parse(const char *buf, size_t len) {
|
|
std::string str(buf, len);
|
|
return parse(str);
|
|
}
|
|
|
|
int HTTPRes::parse(const std::string& str) {
|
|
enum { RES_LINE, HEADER_LINE } expect = RES_LINE;
|
|
std::size_t eoh = str.find(HTTP_EOH); /* request head size */
|
|
std::size_t eol = 0, pos = 0;
|
|
|
|
if (eoh == std::string::npos)
|
|
return 0; /* str not contains complete request */
|
|
|
|
while ((eol = str.find(CRLF, pos)) != std::string::npos) {
|
|
if (expect == RES_LINE) {
|
|
std::string line = str.substr(pos, eol - pos);
|
|
std::vector<std::string> tokens;
|
|
strsplit(line, tokens, ' ', 3);
|
|
if (tokens.size() != 3)
|
|
return -1;
|
|
if (!is_http_version(tokens[0]))
|
|
return -1;
|
|
code = atoi(tokens[1].c_str());
|
|
if (code < 100 || code >= 600)
|
|
return -1;
|
|
/* all ok */
|
|
version = tokens[0];
|
|
status = tokens[2];
|
|
expect = HEADER_LINE;
|
|
} else {
|
|
std::string line = str.substr(pos, eol - pos);
|
|
auto p = parse_header_line(line);
|
|
if (p.first.length () > 0)
|
|
headers.insert (p);
|
|
else
|
|
return -1;
|
|
}
|
|
pos = eol + strlen(CRLF);
|
|
if (pos >= eoh)
|
|
break;
|
|
}
|
|
return eoh + strlen(HTTP_EOH);
|
|
}
|
|
|
|
std::string HTTPRes::to_string() {
|
|
if (version == "HTTP/1.1" && headers.count("Date") == 0) {
|
|
std::string date;
|
|
gen_rfc7231_date(date);
|
|
add_header("Date", date.c_str());
|
|
}
|
|
if (status == "OK" && code != 200)
|
|
status = HTTPCodeToStatus(code); // update
|
|
if (body.length() > 0 && headers.count("Content-Length") == 0)
|
|
add_header("Content-Length", std::to_string(body.length()).c_str());
|
|
/* build response */
|
|
std::stringstream ss;
|
|
ss << version << " " << code << " " << status << CRLF;
|
|
for (auto & h : headers) {
|
|
ss << h.first << ": " << h.second << CRLF;
|
|
}
|
|
ss << CRLF;
|
|
if (body.length() > 0)
|
|
ss << body;
|
|
return ss.str();
|
|
}
|
|
|
|
const char * HTTPCodeToStatus(int code) {
|
|
const char *ptr;
|
|
switch (code) {
|
|
case 105: ptr = "Name Not Resolved"; break;
|
|
/* success */
|
|
case 200: ptr = "OK"; break;
|
|
case 206: ptr = "Partial Content"; break;
|
|
/* redirect */
|
|
case 301: ptr = "Moved Permanently"; break;
|
|
case 302: ptr = "Found"; break;
|
|
case 304: ptr = "Not Modified"; break;
|
|
case 307: ptr = "Temporary Redirect"; break;
|
|
/* client error */
|
|
case 400: ptr = "Bad Request"; break;
|
|
case 401: ptr = "Unauthorized"; break;
|
|
case 403: ptr = "Forbidden"; break;
|
|
case 404: ptr = "Not Found"; break;
|
|
case 407: ptr = "Proxy Authentication Required"; break;
|
|
case 408: ptr = "Request Timeout"; break;
|
|
/* server error */
|
|
case 500: ptr = "Internal Server Error"; break;
|
|
case 502: ptr = "Bad Gateway"; break;
|
|
case 503: ptr = "Not Implemented"; break;
|
|
case 504: ptr = "Gateway Timeout"; break;
|
|
default: ptr = "Unknown Status"; break;
|
|
}
|
|
return ptr;
|
|
}
|
|
|
|
std::string UrlDecode(const std::string& data, bool allow_null)
|
|
{
|
|
std::string decoded(data);
|
|
size_t pos = 0;
|
|
while ((pos = decoded.find('%', pos)) != std::string::npos)
|
|
{
|
|
char c = strtol(decoded.substr(pos + 1, 2).c_str(), NULL, 16);
|
|
if (c == '\0' && !allow_null)
|
|
{
|
|
pos += 3;
|
|
continue;
|
|
}
|
|
decoded.replace(pos, 3, 1, c);
|
|
pos++;
|
|
}
|
|
return decoded;
|
|
}
|
|
|
|
bool MergeChunkedResponse (std::istream& in, std::ostream& out)
|
|
{
|
|
std::string hexLen;
|
|
while (!in.eof ())
|
|
{
|
|
std::getline (in, hexLen);
|
|
errno = 0;
|
|
long int len = strtoul(hexLen.c_str(), (char **) NULL, 16);
|
|
if (errno != 0)
|
|
return false; /* conversion error */
|
|
if (len == 0)
|
|
return true; /* end of stream */
|
|
if (len < 0 || len > 10 * 1024 * 1024) /* < 10Mb */
|
|
return false; /* too large chunk */
|
|
char * buf = new char[len];
|
|
in.read (buf, len);
|
|
out.write (buf, len);
|
|
delete[] buf;
|
|
std::getline (in, hexLen); // read \r\n after chunk
|
|
}
|
|
return true;
|
|
}
|
|
|
|
std::string CreateBasicAuthorizationString (const std::string& user, const std::string& pass)
|
|
{
|
|
if (user.empty () && pass.empty ()) return "";
|
|
return "Basic " + i2p::data::ToBase64Standard (user + ":" + pass);
|
|
}
|
|
|
|
} // http
|
|
} // i2p
|