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一个简单的httpserver库squeasel

 
  • Mar 07, 2021

cloudera开源的一个lib：https://github.com/cloudera/squeasel

许可是：

This is a fork of Mongoose, branched at the last commit of Mongoose that was released as MIT license. Newer versions of Mongoose are now licensed as GPLv2, so we cannot use them in our projects.

所以用旧版本还是可以的。

之所以注意到是因为在yugabyte-db里面偶然看到。关注下的意义主要是c++毕竟没有go那么方便的pprof，用来做个统计信息debug还是比较方便的。

核心就是一个文件，如果不需要用lua写handler的话，直接编译到lib或者加到source里就行。需要的lib主要是ssl\crypto

gcc -o squeasel.c -lpthread -lm -lssl -lcrypto
ar  rcs  libsqueasl.a squeasel.o

改一个example：


#include <stdio.h>
#include <string.h>
#include "squeasel.h"

// This function will be called by squeasel on every new request.
static sq_callback_result_t begin_request_handler(struct sq_connection *conn) {
  const struct sq_request_info *request_info = sq_get_request_info(conn);
  char content[100];

  // Prepare the message we're going to send
  int content_length = snprintf(content, sizeof(content),
                                "Hello from squeasel! Remote port: %d",
                                request_info->remote_port);

  // Send HTTP reply to the client
  sq_printf(conn,
            "HTTP/1.1 200 OK\r\n"
            "Content-Type: text/plain\r\n"
            "Content-Length: %d\r\n"        // Always set Content-Length
            "\r\n"
            "%s",
            content_length, content);

  // Returning non-zero tells squeasel that our function has replied to
  // the client, and squeasel should not send client any more data.
  return (sq_callback_result_t)1;
}

int main(void) {
  struct sq_context *ctx;
  struct sq_callbacks callbacks;

  // List of options. Last element must be NULL.
  const char *options[] = {"listening_ports", "8080", NULL};

  // Prepare callbacks structure. We have only one callback, the rest are NULL.
  memset(&callbacks, 0, sizeof(callbacks));
  callbacks.begin_request = begin_request_handler;

  // Start the web server.
  ctx = sq_start(&callbacks, NULL, options);

  // Wait until user hits "enter". Server is running in separate thread.
  // Navigating to http://localhost:8080 will invoke begin_request_handler().
  getchar();

  // Stop the server.
  sq_stop(ctx);

  return 0;
}

编译执行：

gcc t.cpp -lsqueasl -L. -lssl -lcrypto -lpthread

curl localhost:8080

Hello from squeasel! Remote port: 30586%
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