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implement strsplit using string_view instead stringstream

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orignal 2025-03-15 13:19:53 -04:00
parent 2def747564
commit 67ab4fef6d
1 changed files with 20 additions and 28 deletions
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46
libi2pd/HTTP.cpp
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@ -11,6 +11,7 @@
#include <stdio.h>
#include <ctime>
#include <string_view>
#include <charconv>
#include "util.h"
#include "Base.h"
#include "HTTP.h"
@ -20,7 +21,8 @@ namespace i2p
namespace http
{
// list of valid HTTP methods
static constexpr std::array<std::string_view, 16> HTTP_METHODS = {
static constexpr std::array<std::string_view, 16> 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
};
@ -52,31 +54,17 @@ namespace http
return std::find(HTTP_METHODS.begin(), HTTP_METHODS.end(), str) != std::end(HTTP_METHODS);
}
static void strsplit(std::stringstream& ss, std::vector<std::string> &tokens, char delim, std::size_t limit = 0)
static void strsplit(std::string_view line, std::vector<std::string_view> &tokens, char delim, std::size_t limit = 0)
{
std::size_t count = 0;
std::string token;
while (1)
size_t count = 0, pos;
while ((pos = line.find (delim)) != line.npos)
{
count++;
if (limit > 0 && count >= limit)
delim = '\n'; /* reset delimiter */
if (!std::getline(ss, token, delim))
break;
tokens.push_back(token);
if (limit > 0 && count >= limit) delim = '\n'; // reset delimiter
tokens.push_back (line.substr (0, pos));
line = line.substr (pos + 1);
}
}
static void strsplit(const std::string & line, std::vector<std::string> &tokens, char delim, std::size_t limit = 0)
{
std::stringstream ss{line};
strsplit (ss, tokens, delim, limit);
}
static void strsplit(std::string_view line, std::vector<std::string> &tokens, char delim, std::size_t limit = 0)
{
std::stringstream ss{std::string(line)};
strsplit (ss, tokens, delim, limit);
if (!line.empty ()) tokens.push_back (line);
}
static std::pair<std::string, std::string> parse_header_line(std::string_view line)
@ -222,8 +210,9 @@ namespace http
return true;
}
bool URL::parse_query(std::map<std::string, std::string> & params) {
std::vector<std::string> tokens;
bool URL::parse_query(std::map<std::string, std::string> & params)
{
std::vector<std::string_view> tokens;
strsplit(query, tokens, '&');
params.clear();
@ -319,8 +308,9 @@ namespace http
if (expect == REQ_LINE)
{
std::string_view line = str.substr(pos, eol - pos);
std::vector<std::string> tokens;
std::vector<std::string_view> tokens;
strsplit(line, tokens, ' ');
if (tokens.size() != 3)
return -1;
if (!is_http_method(tokens[0]))
@ -462,13 +452,15 @@ namespace http
if (expect == RES_LINE)
{
std::string_view line = str.substr(pos, eol - pos);
std::vector<std::string> tokens;
std::vector<std::string_view> 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());
auto res = std::from_chars(tokens[1].data (), tokens[1].data() + tokens[1].size(), code);
if (res.ec != std::errc())
return -1;
if (code < 100 || code >= 600)
return -1;
/* all ok */