windows系統MySQL支持調用http接口（mysql-udf-http）

Windows平臺MySQL調用外部http接口詳解

Linux下mysql-udf-http

mysql-udf-http在Linux下編譯安裝，MySQL數據庫創建函數後，可使用http_post或http_get調用外部接口。

windows下mysql-udf-http

mysql-udf-http.c 此鏈接可下載包含了關於http_get以及http_post方法，可通過
visual studio編譯生成dll文件。

注意圖中使用Windows常用工具創建win32位可生成dll的項目

注意此處必須選擇dll

導入下載的.c文件，此文件是之前在網絡上經過我大量篩選所得，需要根據自身環境以及使用情況去修改源文件，如遇到源文件一直報錯編譯不通過，可查閱官網資料，或留言一起討論。

以下是題外話：
一般情況下原文中我不會貼源代碼，（主要太影響別人閱讀，都是說到哪兒，截取那部分，而且我寫博客的版式不太好，但是我覺的我把我知道的技術分享給需要的人才是最重要的，）一般都是放附件或者網盤，評論區留郵箱也會發附件等等，但之前我一篇文章中分段貼了源碼有人竟然說我的附件不能用，我看了下載記錄他並沒有下載，想着讓我給他發原件，我就呵呵了，你要是沒有積分，留個郵箱我一般看見了也會直接發附件的，技術是一個分享過程，而不是在別人評論區瞎喊，旺柴，你記住了麼

最後貼出源文件：

#include <mysql.h>
#include <string.h>

#include <stdio.h>
#include <curl/curl.h>
#include "mysql-udf-http.h"

my_bool http_get_init(UDF_INIT *initid, UDF_ARGS *args, char *message);
char *http_get(UDF_INIT *initid, UDF_ARGS *args, char *result, unsigned long *length, char *is_null, char *error);
void http_get_deinit(UDF_INIT *initid);

my_bool http_post_init(UDF_INIT *initid, UDF_ARGS *args, char *message);
char *http_post(UDF_INIT *initid, UDF_ARGS *args, char *result, unsigned long *length, char *is_null, char *error);
void http_post_deinit(UDF_INIT *initid);

my_bool http_put_init(UDF_INIT *initid, UDF_ARGS *args, char *message);
char *http_put(UDF_INIT *initid, UDF_ARGS *args, char *result, unsigned long *length, char *is_null, char *error);
void http_put_deinit(UDF_INIT *initid);

my_bool http_delete_init(UDF_INIT *initid, UDF_ARGS *args, char *message);
char *http_delete(UDF_INIT *initid, UDF_ARGS *args, char *result, unsigned long *length, char *is_null, char *error);
void http_delete_deinit(UDF_INIT *initid);

static void *myrealloc(void *ptr, size_t size)
{
  /* There might be a realloc() out there that doesn't like reallocing
     NULL pointers, so we take care of it here */
  if (ptr)
    return realloc(ptr, size);
  else
    return malloc(size);
}

static size_t
result_cb(void *ptr, size_t size, size_t nmemb, void *data)
{
  size_t realsize= size * nmemb;
  struct st_curl_results *res= (struct st_curl_results *)data;

  res->result= (char *)myrealloc(res->result, res->size + realsize + 1);
  if (res->result)
  {
    memcpy(&(res->result[res->size]), ptr, realsize);
    res->size += realsize;
    res->result[res->size]= 0;
  }
  return realsize;
}

/* ------------------------HTTP GET----------------------------- */

my_bool http_get_init(UDF_INIT *initid, UDF_ARGS *args, char *message)
{
  st_curl_results *container;

  if (args->arg_count != 1)
  {
    strncpy(message,
            "one argument must be supplied: http_get('<url>').",
            MYSQL_ERRMSG_SIZE);
    return 1;
  }

  args->arg_type[0]= STRING_RESULT;

  initid->max_length= CURL_UDF_MAX_SIZE;
  container= (st_curl_results *)malloc(sizeof(st_curl_results));

  initid->ptr= (char *)container;

  return 0;
}

char *http_get(UDF_INIT *initid, UDF_ARGS *args,
                __attribute__ ((unused)) char *result,
               unsigned long *length,
                __attribute__ ((unused)) char *is_null,
                __attribute__ ((unused)) char *error)
{
  CURLcode retref;
  CURL *curl;
  st_curl_results *res= (st_curl_results *)initid->ptr;

  curl_global_init(CURL_GLOBAL_ALL);
  curl= curl_easy_init();

  res->result= NULL;
  res->size= 0;

  if (curl)
  {
    curl_easy_setopt(curl, CURLOPT_URL, args->args[0]);
    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, result_cb);
    curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)res);
    curl_easy_setopt(curl, CURLOPT_USERAGENT, "mysql-udf-http/1.0");
    retref= curl_easy_perform(curl);
    if (retref) {
      fprintf(stderr, "error\n");
      strcpy(res->result,"");
      *length= 0;
    }
  }
  else
  {
    strcpy(res->result,"");
    *length= 0;
  }
  curl_easy_cleanup(curl);
  *length= res->size;
  return ((char *) res->result);
}

void http_get_deinit(UDF_INIT *initid)
{
  /* if we allocated initid->ptr, free it here */
  st_curl_results *res= (st_curl_results *)initid->ptr;

  free(res->result);
  free(res);
  return;
}

/* ------------------------HTTP POST----------------------------- */

my_bool http_post_init(UDF_INIT *initid, UDF_ARGS *args, char *message)
{
  st_curl_results *container;

  if (args->arg_count != 2)
  {
    strncpy(message,
            "two arguments must be supplied: http_post('<url>','<data>').",
            MYSQL_ERRMSG_SIZE);
    return 1;
  }

  args->arg_type[0]= STRING_RESULT;

  initid->max_length= CURL_UDF_MAX_SIZE;
  container= (st_curl_results *)malloc(sizeof(st_curl_results));

  initid->ptr= (char *)container;

  return 0;
}

char *http_post(UDF_INIT *initid, UDF_ARGS *args,
                __attribute__ ((unused)) char *result,
               unsigned long *length,
                __attribute__ ((unused)) char *is_null,
                __attribute__ ((unused)) char *error)
{
  CURLcode retref;
  CURL *curl;
  st_curl_results *res= (st_curl_results *)initid->ptr;

  curl_global_init(CURL_GLOBAL_ALL);
  curl= curl_easy_init();

  res->result= NULL;
  res->size= 0;

  if (curl)
  {
    struct curl_slist *chunk = NULL;
    chunk = curl_slist_append(chunk, "Expect:");  
  
    curl_easy_setopt(curl, CURLOPT_URL, args->args[0]);
    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, result_cb);
    curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)res);
    curl_easy_setopt(curl, CURLOPT_USERAGENT, "mysql-udf-http/1.0");
    curl_easy_setopt(curl, CURLOPT_HTTPHEADER, chunk);
    curl_easy_setopt(curl, CURLOPT_POSTFIELDS, args->args[1]);
    retref= curl_easy_perform(curl);
    if (retref) {
      fprintf(stderr, "error\n");
      strcpy(res->result,"");
      *length= 0;
    }
  }
  else
  {
    strcpy(res->result,"");
    *length= 0;
  }
  curl_easy_cleanup(curl);
  *length= res->size;
  return ((char *) res->result);
}

void http_post_deinit(UDF_INIT *initid)
{
  /* if we allocated initid->ptr, free it here */
  st_curl_results *res= (st_curl_results *)initid->ptr;

  free(res->result);
  free(res);
  return;
}

/* ------------------------HTTP PUT----------------------------- */

my_bool http_put_init(UDF_INIT *initid, UDF_ARGS *args, char *message)
{
  st_curl_results *container;

  if (args->arg_count != 2)
  {
    strncpy(message,
            "two arguments must be supplied: http_put('<url>','<data>').",
            MYSQL_ERRMSG_SIZE);
    return 1;
  }

  args->arg_type[0]= STRING_RESULT;

  initid->max_length= CURL_UDF_MAX_SIZE;
  container= (st_curl_results *)malloc(sizeof(st_curl_results));

  initid->ptr= (char *)container;

  return 0;
}

char *http_put(UDF_INIT *initid, UDF_ARGS *args,
                __attribute__ ((unused)) char *result,
               unsigned long *length,
                __attribute__ ((unused)) char *is_null,
                __attribute__ ((unused)) char *error)
{
  CURLcode retref;
  CURL *curl;
  st_curl_results *res= (st_curl_results *)initid->ptr;

  curl_global_init(CURL_GLOBAL_ALL);
  curl= curl_easy_init();

  res->result= NULL;
  res->size= 0;

  if (curl)
  {
    struct curl_slist *chunk = NULL;
    chunk = curl_slist_append(chunk, "Expect:");  
  
    curl_easy_setopt(curl, CURLOPT_URL, args->args[0]);
    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, result_cb);
    curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)res);
    curl_easy_setopt(curl, CURLOPT_USERAGENT, "mysql-udf-http/1.0");
    curl_easy_setopt(curl, CURLOPT_HTTPHEADER, chunk);
    curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "PUT");
    curl_easy_setopt(curl, CURLOPT_POSTFIELDS, args->args[1]);
    retref= curl_easy_perform(curl);
    if (retref) {
      fprintf(stderr, "error\n");
      strcpy(res->result,"");
      *length= 0;
    }
  }
  else
  {
    strcpy(res->result,"");
    *length= 0;
  }
  curl_easy_cleanup(curl);
  *length= res->size;
  return ((char *) res->result);
}

void http_put_deinit(UDF_INIT *initid)
{
  /* if we allocated initid->ptr, free it here */
  st_curl_results *res= (st_curl_results *)initid->ptr;

  free(res->result);
  free(res);
  return;
}

/* ------------------------HTTP DELETE----------------------------- */

my_bool http_delete_init(UDF_INIT *initid, UDF_ARGS *args, char *message)
{
  st_curl_results *container;

  if (args->arg_count != 1)
  {
    strncpy(message,
            "one arguments must be supplied: http_delete('<url>').",
            MYSQL_ERRMSG_SIZE);
    return 1;
  }

  args->arg_type[0]= STRING_RESULT;

  initid->max_length= CURL_UDF_MAX_SIZE;
  container= (st_curl_results *)malloc(sizeof(st_curl_results));

  initid->ptr= (char *)container;

  return 0;
}

char *http_delete(UDF_INIT *initid, UDF_ARGS *args,
                __attribute__ ((unused)) char *result,
               unsigned long *length,
                __attribute__ ((unused)) char *is_null,
                __attribute__ ((unused)) char *error)
{
  CURLcode retref;
  CURL *curl;
  st_curl_results *res= (st_curl_results *)initid->ptr;

  curl_global_init(CURL_GLOBAL_ALL);
  curl= curl_easy_init();

  res->result= NULL;
  res->size= 0;

  if (curl)
  { 
    curl_easy_setopt(curl, CURLOPT_URL, args->args[0]);
    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, result_cb);
    curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)res);
    curl_easy_setopt(curl, CURLOPT_USERAGENT, "mysql-udf-http/1.0");
    curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "DELETE");
    retref= curl_easy_perform(curl);
    if (retref) {
      fprintf(stderr, "error\n");
      strcpy(res->result,"");
      *length= 0;
    }
  }
  else
  {
    strcpy(res->result,"");
    *length= 0;
  }
  curl_easy_cleanup(curl);
  *length= res->size;
  return ((char *) res->result);
}

void http_delete_deinit(UDF_INIT *initid)
{
  /* if we allocated initid->ptr, free it here */
  st_curl_results *res= (st_curl_results *)initid->ptr;

  free(res->result);
  free(res);
  return;
}

windows系統MySQL支持調用http接口（mysql-udf-http）

Windows平臺MySQL調用外部http接口詳解

Linux下mysql-udf-http

windows下mysql-udf-http

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