http-parser使用
时间: 2023-12-29 08:02:03 浏览: 21
http-parser是一个解析HTTP消息的C库,可以用于解析HTTP请求和响应。它被广泛应用于HTTP服务器、代理、负载均衡器等网络应用程序中。
使用http-parser,您可以将HTTP消息解析成易于处理的结构体,以便在应用程序中进行进一步处理。例如,您可以使用http-parser来解析HTTP请求标头,并从中提取客户端的IP地址、请求方法、路径和查询参数等信息。
以下是使用http-parser的一些示例:
1. 解析HTTP请求:
```c
#include "http_parser.h"
int on_message_begin(http_parser* parser) {
// HTTP message begin
return 0;
}
int on_url(http_parser* parser, const char* at, size_t length) {
// URL found
return 0;
}
int on_header_field(http_parser* parser, const char* at, size_t length) {
// HTTP header field found
return 0;
}
int on_header_value(http_parser* parser, const char* at, size_t length) {
// HTTP header value found
return 0;
}
int on_headers_complete(http_parser* parser) {
// HTTP headers complete
return 0;
}
int on_body(http_parser* parser, const char* at, size_t length) {
// HTTP body found
return 0;
}
int on_message_complete(http_parser* parser) {
// HTTP message complete
return 0;
}
int main() {
http_parser_settings settings;
http_parser parser;
char* request = "GET /index.html HTTP/1.1\r\nHost: example.com\r\n\r\n";
size_t request_len = strlen(request);
http_parser_settings_init(&settings);
settings.on_message_begin = on_message_begin;
settings.on_url = on_url;
settings.on_header_field = on_header_field;
settings.on_header_value = on_header_value;
settings.on_headers_complete = on_headers_complete;
settings.on_body = on_body;
settings.on_message_complete = on_message_complete;
http_parser_init(&parser, HTTP_REQUEST);
http_parser_execute(&parser, &settings, request, request_len);
return 0;
}
```
2. 解析HTTP响应:
```c
#include "http_parser.h"
int on_message_begin(http_parser* parser) {
// HTTP message begin
return 0;
}
int on_status(http_parser* parser, const char* at, size_t length) {
// HTTP status found
return 0;
}
int on_header_field(http_parser* parser, const char* at, size_t length) {
// HTTP header field found
return 0;
}
int on_header_value(http_parser* parser, const char* at, size_t length) {
// HTTP header value found
return 0;
}
int on_headers_complete(http_parser* parser) {
// HTTP headers complete
return 0;
}
int on_body(http_parser* parser, const char* at, size_t length) {
// HTTP body found
return 0;
}
int on_message_complete(http_parser* parser) {
// HTTP message complete
return 0;
}
int main() {
http_parser_settings settings;
http_parser parser;
char* response = "HTTP/1.1 200 OK\r\nContent-Length: 12\r\n\r\nHello World!";
size_t response_len = strlen(response);
http_parser_settings_init(&settings);
settings.on_message_begin = on_message_begin;
settings.on_status = on_status;
settings.on_header_field = on_header_field;
settings.on_header_value = on_header_value;
settings.on_headers_complete = on_headers_complete;
settings.on_body = on_body;
settings.on_message_complete = on_message_complete;
http_parser_init(&parser, HTTP_RESPONSE);
http_parser_execute(&parser, &settings, response, response_len);
return 0;
}
```
使用上述代码,将会对HTTP请求和响应进行解析,并在回调函数中打印出所找到的HTTP头信息。