mirror of
https://github.com/PurpleI2P/i2pd.git
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+ new http req/res/url structs
This commit is contained in:
hagen
parent
332f0118a2
commit
42b9b6426a
389
HTTP.cpp
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389
HTTP.cpp
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/*
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* Copyright (c) 2013-2016, The PurpleI2P Project
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*
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* This file is part of Purple i2pd project and licensed under BSD3
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*
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* See full license text in LICENSE file at top of project tree
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*/
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#include "HTTP.h"
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namespace i2p {
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namespace http {
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const char *HTTP_METHODS[] = {
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"GET", "HEAD", "POST", "PUT", "PATCH",
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"DELETE", "OPTIONS", "CONNECT",
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NULL
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};
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const char *HTTP_VERSIONS[] = {
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"HTTP/1.0", "HTTP/1.1", NULL
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};
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bool in_cstr_array(const char **haystack, const char *needle) {
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for (const char *p = haystack[0]; p != NULL; p++) {
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if (strcmp(p, needle) == 0)
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return true;
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}
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return false;
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}
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void strsplit(const std::string & line, std::vector<std::string> &tokens, char delim, std::size_t limit = 0) {
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std::size_t count = 0;
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std::stringstream ss(line);
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std::string token;
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while (1) {
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count++;
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if (limit > 0 && count >= limit)
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delim = '\n'; /* reset delimiter */
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if (!std::getline(ss, token, delim))
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break;
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tokens.push_back(token);
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}
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}
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bool parse_header_line(const std::string & line, std::map<std::string, std::string> & headers) {
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std::size_t pos = 0;
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std::size_t len = 2; /* strlen(": ") */
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if ((pos = line.find(": ", pos)) == std::string::npos)
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return false;
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while (isspace(line.at(pos + len)))
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len++;
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std::string name = line.substr(0, pos);
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std::string value = line.substr(pos + len);
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headers[name] = value;
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return true;
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}
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bool URL::parse(const char *str, std::size_t len) {
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std::string url(str, len ? len : strlen(str));
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return parse(url);
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}
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bool URL::parse(const std::string& url) {
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std::size_t pos_p = 0; /* < current parse position */
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std::size_t pos_c = 0; /* < work position */
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if (url.at(0) != '/') {
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/* schema */
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pos_c = url.find("://");
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if (pos_c != std::string::npos) {
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schema = url.substr(0, pos_c);
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pos_p = pos_c + 3;
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}
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/* user[:pass] */
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pos_c = url.find('@', pos_p);
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if (pos_c != std::string::npos) {
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std::size_t delim = url.find(':', pos_p);
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if (delim != std::string::npos && delim < pos_c) {
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user = url.substr(pos_p, delim - pos_p);
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delim += 1;
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pass = url.substr(delim, pos_c - delim);
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} else {
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user = url.substr(pos_p, pos_c - pos_p);
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}
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pos_p = pos_c + 1;
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}
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/* hostname[:port][/path] */
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pos_c = url.find_first_of(":/", pos_p);
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if (pos_c == std::string::npos) {
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/* only hostname, without post and path */
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host = url.substr(pos_p, std::string::npos);
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return true;
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} else if (url.at(pos_c) == ':') {
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host = url.substr(pos_p, pos_c - pos_p);
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/* port[/path] */
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pos_p = pos_c + 1;
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pos_c = url.find('/', pos_p);
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std::string port_str = (pos_c == std::string::npos)
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? url.substr(pos_p, std::string::npos)
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: url.substr(pos_p, pos_c - pos_p);
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/* stoi throws exception on failure, we don't need it */
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for (char c : port_str) {
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if (c < '0' || c > '9')
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return false;
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port *= 10;
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port += c - '0';
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}
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if (pos_c == std::string::npos)
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return true; /* no path part */
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pos_p = pos_c;
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} else {
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/* start of path part found */
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host = url.substr(pos_p, pos_c - pos_p);
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pos_p = pos_c;
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}
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}
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/* pos_p now at start of path part */
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pos_c = url.find_first_of("?#", pos_p);
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if (pos_c == std::string::npos) {
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/* only path, without fragment and query */
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path = url.substr(pos_p, std::string::npos);
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return true;
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} else if (url.at(pos_c) == '?') {
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/* found query part */
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path = url.substr(pos_p, pos_c - pos_p);
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pos_p = pos_c + 1;
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pos_c = url.find('#', pos_p);
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if (pos_c == std::string::npos) {
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/* no fragment */
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query = url.substr(pos_p, std::string::npos);
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return true;
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} else {
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query = url.substr(pos_p, pos_c - pos_p);
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pos_p = pos_c + 1;
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}
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} else {
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/* found fragment part */
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path = url.substr(pos_p, pos_c - pos_p);
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pos_p = pos_c + 1;
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}
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/* pos_p now at start of fragment part */
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frag = url.substr(pos_p, std::string::npos);
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return true;
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}
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bool URL::parse_query(std::map<std::string, std::string> & params) {
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std::vector<std::string> tokens;
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strsplit(query, tokens, '&');
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params.clear();
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for (auto it : tokens) {
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std::size_t eq = it.find ('=');
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if (eq != std::string::npos) {
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auto e = std::pair<std::string, std::string>(it.substr(0, eq), it.substr(eq + 1));
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params.insert(e);
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} else {
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auto e = std::pair<std::string, std::string>(it, "");
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params.insert(e);
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}
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}
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return true;
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}
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std::string URL::to_string() {
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std::string out = "";
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if (schema != "") {
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out = schema + "://";
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if (user != "" && pass != "") {
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out += user + ":" + pass + "@";
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} else if (user != "") {
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out += user + "@";
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}
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if (port) {
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out += host + ":" + std::to_string(port);
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} else {
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out += host;
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}
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}
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out += path;
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if (query != "")
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out += "?" + query;
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if (frag != "")
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out += "#" + frag;
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return out;
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}
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int HTTPReq::parse(const char *buf, size_t len) {
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std::string str(buf, len);
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return parse(str);
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}
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int HTTPReq::parse(const std::string& str) {
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enum { REQ_LINE, HEADER_LINE } expect = REQ_LINE;
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std::size_t eoh = str.find(HTTP_EOH); /* request head size */
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std::size_t eol = 0, pos = 0;
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URL url;
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if (eoh == std::string::npos)
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return 0; /* str not contains complete request */
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while ((eol = str.find(CRLF, pos)) != std::string::npos) {
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if (expect == REQ_LINE) {
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std::string line = str.substr(pos, eol - pos);
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std::vector<std::string> tokens;
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strsplit(line, tokens, ' ');
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if (tokens.size() != 3)
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return -1;
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if (!in_cstr_array(HTTP_METHODS, tokens[0].c_str()))
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return -1;
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if (!in_cstr_array(HTTP_VERSIONS, tokens[2].c_str()))
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return -1;
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if (!url.parse(tokens[1]))
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return -1;
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/* all ok */
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method = tokens[0];
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uri = tokens[1];
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version = tokens[2];
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expect = HEADER_LINE;
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} else {
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std::string line = str.substr(pos, eol - pos);
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if (!parse_header_line(line, headers))
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return -1;
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}
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pos = eol + strlen(CRLF);
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if (pos >= eoh)
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break;
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}
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auto it = headers.find("Host");
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if (it != headers.end ()) {
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host = it->second;
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} else if (version == "HTTP/1.1") {
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return -1; /* 'Host' header required for HTTP/1.1 */
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} else if (url.host != "") {
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host = url.host;
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}
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return eoh + strlen(HTTP_EOH);
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}
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std::string HTTPReq::to_string() {
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std::stringstream ss;
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ss << method << " " << uri << " " << version << CRLF;
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ss << "Host: " << host << CRLF;
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for (auto & h : headers) {
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ss << h.first << ": " << h.second << CRLF;
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}
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ss << CRLF;
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return ss.str();
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}
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bool HTTPRes::is_chunked() {
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auto it = headers.find("Transfer-Encoding");
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if (it == headers.end())
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return false;
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if (it->second.find("chunked") == std::string::npos)
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return true;
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return false;
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}
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long int HTTPRes::length() {
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unsigned long int length = 0;
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auto it = headers.find("Content-Length");
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if (it == headers.end())
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return -1;
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errno = 0;
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length = std::strtoul(it->second.c_str(), (char **) NULL, 10);
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if (errno != 0)
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return -1;
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return length;
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}
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int HTTPRes::parse(const char *buf, size_t len) {
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std::string str(buf, len);
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return parse(str);
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}
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int HTTPRes::parse(const std::string& str) {
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enum { RES_LINE, HEADER_LINE } expect = RES_LINE;
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std::size_t eoh = str.find(HTTP_EOH); /* request head size */
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std::size_t eol = 0, pos = 0;
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if (eoh == std::string::npos)
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return 0; /* str not contains complete request */
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while ((eol = str.find(CRLF, pos)) != std::string::npos) {
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if (expect == RES_LINE) {
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std::string line = str.substr(pos, eol - pos);
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std::vector<std::string> tokens;
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strsplit(line, tokens, ' ', 3);
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if (tokens.size() != 3)
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return -1;
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if (!in_cstr_array(HTTP_VERSIONS, tokens[0].c_str()))
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return -1;
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code = atoi(tokens[1].c_str());
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if (code < 100 || code >= 600)
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return -1;
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/* all ok */
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version = tokens[0];
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status = tokens[2];
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expect = HEADER_LINE;
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} else {
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std::string line = str.substr(pos, eol - pos);
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if (!parse_header_line(line, headers))
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return -1;
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}
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pos = eol + strlen(CRLF);
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if (pos >= eoh)
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break;
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}
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return eoh + strlen(HTTP_EOH);
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}
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std::string HTTPRes::to_string() {
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std::stringstream ss;
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ss << version << " " << code << " " << status << CRLF;
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for (auto & h : headers) {
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ss << h.first << ": " << h.second << CRLF;
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}
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ss << CRLF;
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return ss.str();
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}
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const char * HTTPCodeToStatus(int code) {
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const char *ptr;
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switch (code) {
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case 105: ptr = "Name Not Resolved"; break;
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/* success */
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case 200: ptr = "OK"; break;
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case 206: ptr = "Partial Content"; break;
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/* redirect */
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case 301: ptr = "Moved Permanently"; break;
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case 302: ptr = "Found"; break;
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case 304: ptr = "Not Modified"; break;
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case 307: ptr = "Temporary Redirect"; break;
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/* client error */
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case 400: ptr = "Bad Request"; break;
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case 401: ptr = "Unauthorized"; break;
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case 403: ptr = "Forbidden"; break;
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case 404: ptr = "Not Found"; break;
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case 407: ptr = "Proxy Authentication Required"; break;
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case 408: ptr = "Request Timeout"; break;
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/* server error */
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case 500: ptr = "Internal Server Error"; break;
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case 502: ptr = "Bad Gateway"; break;
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case 503: ptr = "Not Implemented"; break;
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case 504: ptr = "Gateway Timeout"; break;
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default: ptr = "Unknown Status"; break;
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}
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return ptr;
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}
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std::string UrlDecode(const std::string& data, bool allow_null) {
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std::string decoded(data);
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size_t pos = 0;
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while ((pos = decoded.find('%', pos)) != std::string::npos) {
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char c = strtol(decoded.substr(pos + 1, 2).c_str(), NULL, 16);
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if (c == '\0' && !allow_null) {
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pos += 3;
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continue;
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}
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decoded.replace(pos, 3, 1, c);
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pos++;
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}
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return decoded;
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}
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bool MergeChunkedResponse (std::istream& in, std::ostream& out) {
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std::string hexLen;
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long int len;
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while (!in.eof ()) {
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std::getline (in, hexLen);
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errno = 0;
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len = strtoul(hexLen.c_str(), (char **) NULL, 16);
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if (errno != 0)
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return false; /* conversion error */
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if (len == 0)
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return true; /* end of stream */
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if (len < 0 || len > 10 * 1024 * 1024) /* < 10Mb */
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return false; /* too large chunk */
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char * buf = new char[len];
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in.read (buf, len);
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out.write (buf, len);
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delete[] buf;
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std::getline (in, hexLen); // read \r\n after chunk
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}
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return true;
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}
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} // http
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} // i2p
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121
HTTP.h
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121
HTTP.h
Normal file
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@ -0,0 +1,121 @@
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/*
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* Copyright (c) 2013-2016, The PurpleI2P Project
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*
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* This file is part of Purple i2pd project and licensed under BSD3
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*
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* See full license text in LICENSE file at top of project tree
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*/
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#ifndef HTTP_H__
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#define HTTP_H__
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#include <cstring>
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#include <map>
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#include <sstream>
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#include <string>
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#include <vector>
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namespace i2p {
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namespace http {
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const char CRLF[] = "\r\n"; /**< HTTP line terminator */
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const char HTTP_EOH[] = "\r\n\r\n"; /**< HTTP end-of-headers mark */
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extern const char *HTTP_METHODS[]; /**< list of valid HTTP methods */
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extern const char *HTTP_VERSIONS[]; /**< list of valid HTTP versions */
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struct URL {
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std::string schema;
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std::string user;
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std::string pass;
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std::string host;
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unsigned short int port;
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std::string path;
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std::string query;
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std::string frag;
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URL(): schema(""), user(""), pass(""), host(""), port(0), path(""), query(""), frag("") {};
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/**
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* @brief Tries to parse url from string
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* @return true on success, false on invalid url
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*/
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bool parse (const char *str, size_t len = 0);
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bool parse (const std::string& url);
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/**
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* @brief Parse query part of url to key/value map
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* @note Honestly, this should be implemented with std::multimap
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*/
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bool parse_query(std::map<std::string, std::string> & params);
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/**
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* @brief Serialize URL structure to url
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* @note Returns relative url if schema if empty, absolute url otherwise
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*/
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std::string to_string ();
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};
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struct HTTPReq {
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std::map<std::string, std::string> headers;
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std::string version;
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std::string method;
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std::string uri;
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std::string host;
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HTTPReq (): version("HTTP/1.0"), method("GET"), uri("/") {};
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/**
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* @brief Tries to parse HTTP request from string
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* @return -1 on error, 0 on incomplete query, >0 on success
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* @note Positive return value is a size of header
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*/
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int parse(const char *buf, size_t len);
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int parse(const std::string& buf);
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/** @brief Serialize HTTP request to string */
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std::string to_string();
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};
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struct HTTPRes {
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std::map<std::string, std::string> headers;
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std::string version;
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std::string status;
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unsigned short int code;
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HTTPRes (): version("HTTP/1.1"), status("OK"), code(200) {}
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/**
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* @brief Tries to parse HTTP response from string
|
||||
* @return -1 on error, 0 on incomplete query, >0 on success
|
||||
* @note Positive return value is a size of header
|
||||
*/
|
||||
int parse(const char *buf, size_t len);
|
||||
int parse(const std::string& buf);
|
||||
|
||||
/** @brief Serialize HTTP response to string */
|
||||
std::string to_string();
|
||||
|
||||
/** @brief Checks that response declared as chunked data */
|
||||
bool is_chunked();
|
||||
|
||||
/** @brief Returns declared response length or -1 if unknown */
|
||||
long int length();
|
||||
};
|
||||
|
||||
/**
|
||||
* @brief returns HTTP status string by integer code
|
||||
* @param code HTTP code [100, 599]
|
||||
* @return Immutable string with status
|
||||
*/
|
||||
const char * HTTPCodeToStatus(int code);
|
||||
|
||||
/**
|
||||
* @brief Replaces %-encoded characters in string with their values
|
||||
* @param data Source string
|
||||
* @param null If set to true - decode also %00 sequence, otherwise - skip
|
||||
* @return Decoded string
|
||||
*/
|
||||
std::string UrlDecode(const std::string& data, bool null = false);
|
||||
} // http
|
||||
} // i2p
|
||||
|
||||
#endif /* HTTP_H__ */
|
||||
Loading…
Reference in a new issue