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ngx_http_image_module.c
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/*
* Copyright (C) Vampire
*
* {根据URL生成缩略图/添加水印}
*
* nginx.conf 配置值
* image on/off 是否开启缩略图功能,默认关闭
* image_backend on/off 是否开启镜像服务
* image_backend_server 镜像服务器地址
* image_output on/off 是否不生成图片而直接处理后输出 默认off
* image_jpeg_quality 75 生成JPEG图片的质量 默认值75
* image_water on/off 是否开启水印功能
* image_water_type 0/1 水印类型 0:图片水印 1:文字水印
* image_water_min 300 300 图片宽度 300 高度 300 的情况才添加水印
* image_water_pos 0-9 水印位置 默认值9 0为随机位置,1为顶端居左,2为顶端居中,3为顶端居右,4为中部居左,5为中部居中,6为中部居右,7为底端居左,8为底端居中,9为底端居右
* image_water_file 水印文件(jpg/png/gif),绝对路径或者相对路径的水印图片
* image_water_transparent 水印透明度,默认20
* image_water_text 水印文字 "Power By Vampire"
* image_water_font_size 水印大小 默认 5
* image_water_font;//文字水印字体文件路径
* image_water_color 水印文字颜色,默认 #000000
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>
#include <string.h>
#include <gd.h>
#include <gdfontg.h>
#include <dirent.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <pcre.h>
#include <curl/curl.h>
#include "ngx_http_request.h"
#define NGX_IMAGE_NONE 0
#define NGX_IMAGE_JPEG 1
#define NGX_IMAGE_GIF 2
#define NGX_IMAGE_PNG 3
#define NGX_IMAGE_BMP 4
#define MAX_DIR_PATH_LEN 256
#ifndef WIN32
#define stricmp strcasecmp
#endif
typedef struct
{
ngx_flag_t image_status;//是否打开图片处理
char * url;//请求URL地址
char request_dir[MAX_DIR_PATH_LEN];//URL目录
char * request_source;//URL源文件URL
char * request_filename;//URL中的文件名
char local_dir[MAX_DIR_PATH_LEN];//当前WEB目录
char * extension;//目标图片后缀名 (png/gif/jpg/jpeg/jpe)
char * m_type;//生成缩略图的方式 缩放/居中缩放/顶部10%开始缩放
char * source_file;//原始图片路径
char * dest_file;//目标图片路径
u_char * img_data;//图片内容
char buffer[10][255];
gdImagePtr src_im;//原始图片GD对象
gdImagePtr dst_im;//目标图片GD对象
gdImagePtr w_im;//补白边图片GD对象
int w_margin;//是否对图片补白边
int img_size;//图片大小
int pcre_type;//图片正则匹配类型 0为新规则(test.jpg!c300x300.jpg) 1为旧规则(test.c300x300.jpg)
int header_type;//HTTP头部类型
int max_width;//目标图片最大宽度
int max_height;//目标图片最大宽度
int src_type;//原始图片类型
int dest_type;//目标图片类型
int src_width;//原始图片宽度
int src_height;//原始图片高度
int src_x;//原始图片X坐标
int src_y;//原始图片Y坐标
int src_w;//原始图片宽度
int src_h;//原始图片高度
int width;//目标图片宽度
int height;//目标图片高度
int dst_x;//目标图片X坐标
int dst_y;//目标图片Y坐标
ngx_flag_t image_output;//是否不保存图片直接输出图片内容给客户端 默认off
int jpeg_quality;//JPEG图片质量 默认75
gdImagePtr water_im;//水印图片GD对象
ngx_flag_t water_status;//是否打开水印功能 默认关闭
int water_im_type;//水印图片类型
int water_type;//水印类型 0:图片水印 1:文字水印
int water_pos;//水印位置
int water_transparent;//水印透明度
int water_width_min;//原图小于该宽度的图片不添加水印
int water_height_min;//原图小于该高度的图片不添加水印
ngx_flag_t backend;//是否请求原始服务器
ngx_str_t backend_server;//图片原始服务器,如请求的图片不存在,从该服务器下载
ngx_str_t water_image;//水印图片
ngx_str_t water_text;//水印文字内容
int water_font_size;//水印文字大小
ngx_str_t water_font;//文字水印字体文件路径
ngx_str_t water_color;//水印文字颜色 (#0000000)
ngx_http_request_t *request;//HTTP请求源
} ngx_image_conf_t;
static FILE *curl_handle;
static ngx_str_t ngx_http_image_types[] =
{
ngx_string("text/html"),
ngx_string("image/jpeg"),
ngx_string("image/gif"),
ngx_string("image/png")
};
static char *ngx_http_image(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
static void *ngx_http_image_create_loc_conf(ngx_conf_t *cf);
static char *ngx_http_image_merge_loc_conf(ngx_conf_t *cf,void *parent, void *child);
static char * ngx_http_image_water_min(ngx_conf_t *cf, ngx_command_t *cmd,void *conf);
static ngx_uint_t ngx_http_image_value(ngx_str_t *value);
char * ngx_conf_set_number_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
char * ngx_conf_set_string_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
static ngx_int_t output(ngx_http_request_t *r,void *conf,ngx_str_t type);
static void gd_clean_data(void *data);//清除GD DATA数据
static void make_thumb(void *conf);//创建GD对象缩略图,缩略图在此函数中已经处理好,但没有写入到文件
static void water_mark(void *conf);//给图片打上水印
static void thumb_to_string(void *conf);//GD对象数据转换为二进制字符串
static int parse_image_info(void *conf);//根据正则获取基本的图片信息
static int calc_image_info(void *conf);//根据基本图片信息计算缩略图信息
static void check_image_type(void *conf);//判断图片类型
static char * get_ext(char *filename);//根据文件名取图片类型
static int get_ext_header(char *filename);//根据文件头取图片类型
static int file_exists(char *filename);//判断文件是否存在
static int read_img(char **filename,int * size,void ** buffer, ngx_http_request_t *request);//图片读入函数
static void write_img(void * conf);//图片保存到文件
static void water_image_from(void * conf);//创建水印图片GD对象
static void image_from(void * conf);//创建原图GD库对象
static int get_header(char *url);//取得远程URL的返回值
static size_t curl_get_data(void *ptr, size_t size, size_t nmemb, void *stream);//CURL调用函数
static int create_dir(char *dir);//递归创建目录
static void get_request_source(void *conf);
static void dirname(char *path,char *dirpath);//根据URL获取目录路径
static void download(void * conf);//下载文件
static int ngx_log(const char *format, ...);
//日志模式
#define LOG_MODE_DISABLE 0 //不输出日志
#define LOG_MODE_CONSOLE 1 //日志输出到控制台
#define LOG_MODE_FILE 2 //日志输出到文件
#define LOG_MODE LOG_MODE_DISABLE
#if LOG_MODE == LOG_MODE_FILE
#define PRINT_LOG(level, log, ...) ngx_log_error(level, log, 0, __VA_ARGS__)
#else
#define PRINT_LOG(level, log, ...) ngx_log(__VA_ARGS__)
#endif
static ngx_command_t ngx_http_image_commands[] =
{
{
ngx_string("image"),
NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
ngx_http_image,
NGX_HTTP_LOC_CONF_OFFSET,
0,
NULL
},
{
ngx_string("image_output"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
ngx_conf_set_flag_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_image_conf_t, image_output),
NULL
},
{
ngx_string("image_backend"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
ngx_conf_set_flag_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_image_conf_t, backend),
NULL
},
{
ngx_string("image_backend_server"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_image_conf_t, backend_server),
NULL
},
{
ngx_string("image_water"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
ngx_conf_set_flag_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_image_conf_t, water_status),
NULL
},
{
ngx_string("image_water_type"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_ARGS_NUMBER,
ngx_conf_set_number_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_image_conf_t, water_type),
NULL
},
{
ngx_string("image_water_min"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2,
ngx_http_image_water_min,
NGX_HTTP_LOC_CONF_OFFSET,
0,
NULL
},
{
ngx_string("image_water_pos"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_ARGS_NUMBER,
ngx_conf_set_number_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_image_conf_t, water_pos),
NULL
},
{
ngx_string("image_water_file"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_image_conf_t, water_image),
NULL
},
{
ngx_string("image_water_transparent"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
ngx_conf_set_number_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_image_conf_t, water_transparent),
NULL
},
{
ngx_string("image_water_text"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_image_conf_t, water_text),
NULL
},
{
ngx_string("image_water_font"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_image_conf_t, water_font),
NULL
},
{
ngx_string("image_water_font_size"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_ARGS_NUMBER,
ngx_conf_set_number_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_image_conf_t, water_font_size),
NULL
},
{
ngx_string("image_water_color"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_image_conf_t, water_color),
NULL
},
{
ngx_string("image_jpeg_quality"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_ARGS_NUMBER,
ngx_conf_set_number_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_image_conf_t, jpeg_quality),
NULL
},
ngx_null_command
};
static ngx_http_module_t ngx_http_image_module_ctx =
{
NULL, /* preconfiguration */
NULL, /* postconfiguration */
NULL, /* create main configuration */
NULL, /* init main configuration */
NULL, /* create server configuration */
NULL, /* merge server configuration */
ngx_http_image_create_loc_conf, /* create location configuration */
ngx_http_image_merge_loc_conf /* merge location configuration */
};
ngx_module_t ngx_http_image_module =
{
NGX_MODULE_V1,
&ngx_http_image_module_ctx, /* module context */
ngx_http_image_commands, /* module directives */
NGX_HTTP_MODULE, /* module type */
NULL, /* init master */
NULL, /* init module */
NULL, /* init process */
NULL, /* init thread */
NULL, /* exit thread */
NULL, /* exit process */
NULL, /* exit master */
NGX_MODULE_V1_PADDING
};
static int
ngx_log(const char *format, ...)
{
#if LOG_MODE == LOG_MODE_DISABLE
return 0;
#endif
int done;
va_list arg;
//打印临时日志
time_t rawtime;
struct tm * timeinfo;
time ( &rawtime );
timeinfo = localtime ( &rawtime );
printf ( "[INFO_Image] %04d.%02d.%02d %02d:%02d:%02d ",
timeinfo->tm_year+1900, timeinfo->tm_mon+1, timeinfo->tm_mday,
timeinfo->tm_hour, timeinfo->tm_min, timeinfo->tm_sec );
va_start (arg, format);
done = vfprintf (stdout, format, arg);
va_end (arg);
return done;
};
static void *
ngx_http_image_create_loc_conf(ngx_conf_t *cf)
{
PRINT_LOG(NGX_LOG_ERR, cf->log, "FUNC ngx_http_image_create_loc_conf \n");
ngx_image_conf_t *conf;
conf = ngx_pcalloc(cf->pool, sizeof(ngx_image_conf_t));
if (conf == NULL)
{
return NULL;
}
conf->image_status = NGX_CONF_UNSET;
conf->backend = NGX_CONF_UNSET;
conf->jpeg_quality = NGX_CONF_UNSET;
conf->image_output = NGX_CONF_UNSET;
conf->water_status = NGX_CONF_UNSET;
conf->water_type = NGX_CONF_UNSET;
conf->water_pos = NGX_CONF_UNSET;
conf->water_transparent = NGX_CONF_UNSET;
conf->water_width_min = NGX_CONF_UNSET;
conf->water_height_min = NGX_CONF_UNSET;
conf->water_font_size = NGX_CONF_UNSET;
return conf;
}
static char *
ngx_http_image_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
{
PRINT_LOG(NGX_LOG_ERR, cf->log, "FUNC ngx_http_image_merge_loc_conf \n");
ngx_image_conf_t *prev = parent;
ngx_image_conf_t *conf = child;
ngx_conf_merge_value(conf->image_status,prev->image_status,0);
ngx_conf_merge_value(conf->backend,prev->backend,0);
ngx_conf_merge_str_value(conf->backend_server,prev->backend_server,"http://image.oupula.org/");
ngx_conf_merge_value(conf->jpeg_quality,prev->jpeg_quality,75);
ngx_conf_merge_value(conf->water_type,prev->water_type,0);
ngx_conf_merge_value(conf->water_width_min,prev->water_width_min,0);
ngx_conf_merge_value(conf->water_height_min,prev->water_height_min,0);
ngx_conf_merge_value(conf->water_pos,prev->water_pos,9);
ngx_conf_merge_value(conf->water_transparent,prev->water_transparent,20);
ngx_conf_merge_str_value(conf->water_text,prev->water_text,"[ Copyright By Vampire ]");
ngx_conf_merge_value(conf->water_font_size,prev->water_font_size,5);
ngx_conf_merge_str_value(conf->water_font,prev->water_font,"/usr/share/fonts/truetype/wqy/wqy-microhei.ttc");
ngx_conf_merge_str_value(conf->water_color,prev->water_color,"#000000");
return NGX_CONF_OK;
}
static ngx_int_t ngx_http_image_handler(ngx_http_request_t *r)
{
PRINT_LOG(NGX_LOG_ERR, r->connection->log, "FUNC ngx_http_image_handler \n");
u_char *last;
size_t root;
ngx_int_t rc;
ngx_str_t path;
char request_uri[255];
int request_uri_len;
ngx_image_conf_t *conf;
conf = ngx_http_get_module_loc_conf(r, ngx_http_image_module);
conf->request = r;
if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD)))
{
return NGX_HTTP_NOT_ALLOWED;
}
if (r->headers_in.if_modified_since)
{
return NGX_HTTP_NOT_MODIFIED;
}
if (r->uri.data[r->uri.len - 1] == '/')
{
return NGX_DECLINED;
}
rc = ngx_http_discard_request_body(r);
if (rc != NGX_OK)
{
return rc;
}
last = ngx_http_map_uri_to_path(r, &path, &root, 0); //从原服务器获取实际路径
if (last == NULL)
{
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
PRINT_LOG(NGX_LOG_ERR, r->connection->log, "FUNC ngx_http_image_handler, path = %s\n",
(char *) path.data);
if(file_exists((char*) path.data) == -1)
{
request_uri_len = strlen((char *)r->uri_start) - strlen((char *)r->uri_end);
strncpy(request_uri, (char *)r->uri_start, request_uri_len);
request_uri[request_uri_len] = '\0';
dirname(request_uri,conf->request_dir);
conf->url = request_uri;//请求的URL地址
conf->dest_file = (char *)path.data;
check_image_type(conf);//检查图片类型(根据后缀进行简单判断)
PRINT_LOG(NGX_LOG_ERR, r->connection->log,
"FUNC ngx_http_image_handler, request_uri = %s\n", request_uri);
if( conf->dest_type > 0 )
{
if (parse_image_info(conf) == 0)//解析并处理请求的图片URL
{
make_thumb(conf);//生成图片缩略图
water_mark(conf);//图片打上水印
thumb_to_string(conf);//GD对象转换成二进制字符串
if(conf->image_output == 0)
{
write_img(conf);//保存图片缩略图到文件
}
if(conf->image_output == 1)
{
return output(r,conf,ngx_http_image_types[conf->dest_type]);
}
}
}
}
return NGX_DECLINED;
}
static char * ngx_http_image_water_min(ngx_conf_t *cf, ngx_command_t *cmd,void *conf)
{
PRINT_LOG(NGX_LOG_ERR, cf->log, "FUNC ngx_http_image_water_min \n");
ngx_image_conf_t *info = conf;
ngx_str_t *value;
ngx_http_complex_value_t cv;
ngx_http_compile_complex_value_t ccv;
value = cf->args->elts;
ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
ccv.cf = cf;
ccv.value = &value[1];
ccv.complex_value = &cv;
if (ngx_http_compile_complex_value(&ccv) != NGX_OK)
{
return NGX_CONF_ERROR;
}
if (cv.lengths == NULL)
{
info->water_width_min = (int)ngx_http_image_value(&value[1]);
info->water_height_min = (int)ngx_http_image_value(&value[2]);
}
return NGX_CONF_OK;
}
static ngx_uint_t ngx_http_image_value(ngx_str_t *value)
{
ngx_int_t n;
if (value->len == 1 && value->data[0] == '-')
{
return (ngx_uint_t) -1;
}
n = ngx_atoi(value->data, value->len);
if (n > 0)
{
return (ngx_uint_t) n;
}
return 0;
}
char * ngx_conf_set_number_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
PRINT_LOG(NGX_LOG_ERR, cf->log, "FUNC ngx_conf_set_number_slot \n");
char *p = conf;
int *np;
ngx_str_t *value;
np = (int *) (p + cmd->offset);
if (*np != NGX_CONF_UNSET)
{
return "is duplicate";
}
value = cf->args->elts;
*np = (int)ngx_atoi(value[1].data, value[1].len);
if (*np == NGX_ERROR)
{
return "invalid number";
}
return NGX_CONF_OK;
}
static char *
ngx_http_image(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
PRINT_LOG(NGX_LOG_ERR, cf->log, "FUNC ngx_http_image \n");
ngx_str_t *value;
value = cf->args->elts;
if (ngx_strcasecmp(value[1].data, (u_char *) "on") == 0)
{
ngx_http_core_loc_conf_t *clcf;
clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
clcf->handler = ngx_http_image_handler;
return NGX_CONF_OK;
}
else if (ngx_strcasecmp(value[1].data, (u_char *) "off") == 0)
{
return NGX_CONF_OK;
}
else
{
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,"invalid value \"%s\" in \"%s\" directive, ""it must be \"on\" or \"off\"",value[1].data, cmd->name.data);
return NGX_CONF_ERROR;
}
return NGX_CONF_OK;
}
static ngx_int_t output(ngx_http_request_t *r,void *conf,ngx_str_t type)
{
PRINT_LOG(NGX_LOG_ERR, r->connection->log, "FUNC output \n");
ngx_int_t status = 0;
ngx_image_conf_t *info = conf;
ngx_http_complex_value_t cv;
ngx_pool_cleanup_t *cln;
cln = ngx_pool_cleanup_add(r->pool, 0);
if (cln == NULL) {
PRINT_LOG(NGX_LOG_ERR, r->connection->log, "FUNC output 1\n");
gd_clean_data(info);
return status;
}
PRINT_LOG(NGX_LOG_ERR, r->connection->log, "FUNC output 2\n");
cln->handler = gd_clean_data;
cln->data = info;
ngx_memzero(&cv, sizeof(ngx_http_complex_value_t));
cv.value.len = info->img_size;
cv.value.data = (u_char *)info->img_data;
status = ngx_http_send_response(r, NGX_HTTP_OK, &type, &cv);
return status;
}
static void thumb_to_string(void *conf)
{
ngx_image_conf_t *info = conf;
PRINT_LOG(NGX_LOG_ERR, info->request->connection->log, "FUNC thumb_to_string \n");
switch(info->dest_type)
{
case NGX_IMAGE_PNG:
info->img_data = gdImagePngPtr(info->dst_im,&info->img_size);
break;
case NGX_IMAGE_GIF:
info->img_data = gdImageGifPtr(info->dst_im,&info->img_size);
break;
case NGX_IMAGE_JPEG:
info->img_data = gdImageJpegPtr(info->dst_im,&info->img_size,info->jpeg_quality);
break;
}
PRINT_LOG(NGX_LOG_ERR, info->request->connection->log,
"FUNC thumb_to_string, gdImageDestroy(info->dst_im), info->dst_im = %p\n", info->dst_im);
if (info->dst_im)
{
gdImageDestroy(info->dst_im);
info->dst_im = NULL;
}
}
static void gd_clean_data(void *data){
ngx_image_conf_t *info = data;
if (info->img_data)
{
PRINT_LOG(NGX_LOG_ERR, info->request->connection->log,
"FUNC gd_clean_data, gdFree(info->img_data), info->img_data = %p, info->img_size = %d \n",
info->img_data, info->img_size);
gdFree(info->img_data);
info->img_data = NULL;
}
if (info->src_im)
{
PRINT_LOG(NGX_LOG_ERR, info->request->connection->log,
"FUNC gd_clean_data, gdImageDestroy(info->src_im), info->src_im = %p \n", info->src_im);
gdImageDestroy(info->src_im);
info->src_im = NULL;
}
if (info->dst_im)
{
PRINT_LOG(NGX_LOG_ERR, info->request->connection->log,
"FUNC gd_clean_data, gdImageDestroy(info->dst_im), info->dst_im = %p \n", info->dst_im);
gdImageDestroy(info->dst_im);
info->dst_im = NULL;
}
if (info->w_im)
{
PRINT_LOG(NGX_LOG_ERR, info->request->connection->log,
"FUNC gd_clean_data, gdImageDestroy(info->w_im), info->w_im = %p \n", info->w_im);
gdImageDestroy(info->w_im);
info->w_im = NULL;
}
if (info->water_im)
{
PRINT_LOG(NGX_LOG_ERR, info->request->connection->log,
"FUNC gd_clean_data, gdImageDestroy(info->water_im), info->water_im = %p \n", info->water_im);
gdImageDestroy(info->water_im);
info->water_im = NULL;
}
}
static void make_thumb(void *conf)
{
int colors = 0;
int transparent = -1;
ngx_image_conf_t *info = conf;
info->dst_im = gdImageCreateTrueColor(info->width,info->height); //这里根据转换后的参数生产图片
colors = gdImageColorsTotal(info->src_im);
transparent = gdImageGetTransparent(info->src_im);
PRINT_LOG(NGX_LOG_ERR, info->request->connection->log, "FUNC make_thumb \n");
if (transparent == -1)
{
gdImageSaveAlpha(info->src_im,1);
gdImageColorTransparent(info->src_im, -1);
if(colors == 0)
{
gdImageAlphaBlending(info->dst_im,0);
gdImageSaveAlpha(info->dst_im,1);
}
if(colors)
{
gdImageTrueColorToPalette(info->dst_im,1,256);
}
}
if(info->w_margin == 1)
{
info->w_im = gdImageCreateTrueColor(info->width,info->height);
gdImageFilledRectangle(info->w_im, 0, 0, info->width,info->height, gdImageColorAllocate(info->w_im, 255, 255, 255));
if (info->dst_im)
{
gdImageDestroy(info->dst_im);
info->dst_im = NULL;
}
info->dst_im = gdImageCreateTrueColor(info->max_width,info->max_height);
gdImageFilledRectangle(info->dst_im, 0, 0, info->max_width,info->max_height, gdImageColorAllocate(info->dst_im, 255, 255, 255));
gdImageCopyResampled(info->w_im, info->src_im, 0, 0, info->src_x, info->src_y,info->width, info->height, info->src_w,info->src_h);
gdImageCopyResampled(info->dst_im, info->w_im, info->dst_x,info->dst_y, 0, 0,info->width, info->height, info->width, info->height);
gdImageDestroy(info->w_im);
info->w_im = NULL;
}
else
{
gdImageCopyResampled(info->dst_im,info->src_im,info->dst_x,info->dst_y,info->src_x,info->src_y,info->width,info->height,info->src_w,info->src_h);
}
gdImageDestroy(info->src_im);
info->src_im = NULL;
}
static void water_mark(void *conf)
{
ngx_image_conf_t *info = conf;
int water_w=0;//水印宽度
int water_h=0;//水印高度
int posX = 0;//X位置
int posY = 0;//Y位置
int water_color = 0;//文字水印GD颜色值
char *water_text;//图片文字
char *water_font;//文字字体
char *water_color_text;//图片颜色值
water_text = NULL;
water_font = NULL;
water_color_text = NULL;
PRINT_LOG(NGX_LOG_ERR, info->request->connection->log, "FUNC water_mark \n");
if(info->water_status)//如果水印功能打开了
{
if(info->water_type == 0)//如果为图片水印
{
if(file_exists((char *)info->water_image.data) == 0)//判断水印图片是否存在
{
water_image_from(conf);//获取水印图片信息
if(info->water_im == NULL)//判断对象是否为空
{
return;//水印文件异常
} else {
water_w = info->water_im->sx;
water_h = info->water_im->sy;
}
}
else
{
return;//水印图片不存在
}
}
else//文字水印
{
water_text = (char *) info->water_text.data;
water_color_text = (char *) info->water_color.data;
water_font = (char *)info->water_font.data;
if(file_exists((char *)water_font) == 0)//如果水印字体存在
{
int R,G,B;
char R_str[3],G_str[3],B_str[3];
int brect[8];
gdImagePtr font_im;
font_im = gdImageCreateTrueColor(info->dst_im->sx,info->dst_im->sy);
sprintf(R_str,"%.*s",2,water_color_text+1);
sprintf(G_str,"%.*s",2,water_color_text+3);
sprintf(B_str,"%.*s",2,water_color_text+5);
sscanf(R_str,"%x",&R);
sscanf(G_str,"%x",&G);
sscanf(B_str,"%x",&B);
water_color = gdImageColorAllocate(info->dst_im,R,G,B);
gdImageStringFT(font_im, &brect[0], water_color, water_font, info->water_font_size, 0.0, 0, 0,water_text/*, &strex*/);
//water_w = abs(brect[2] - brect[6] + 10);
water_w = abs(brect[2] - brect[6] + 10);
water_h = abs(brect[3] - brect[7]);
gdImageDestroy(font_im);
}
}
if( (info->width < info->water_width_min) || info->height < info->water_height_min)
{
return;//如果图片宽度/高度比配置文件里规定的宽度/高度宽度小
}
if ((info->width < water_w) || (info->height < water_h))
{
return;//如果图片宽度/高度比水印宽度/高度宽度小
}
if(info->water_pos < 1 ||info->water_pos > 9)
{
srand((unsigned)time(NULL));
//info->water_pos = rand() % 9 + 1;
info->water_pos = 1+(int)(9.0*rand()/(RAND_MAX+1.0));
//info->water_pos = rand() % 9;
}
switch(info->water_pos)
{
case 1:
posX = 10;
posY = 15;
break;
case 2:
posX = (info->width - water_w) / 2;
posY = 15;
break;
case 3:
posX = info->width - water_w;
posY = 15;
break;
case 4:
posX = 0;
posY = (info->height - water_h) / 2;
break;
case 5:
posX = (info->width - water_w) / 2;
posY = (info->height - water_h) / 2;
break;
case 6:
posX = info->width - water_w;
posY = (info->height - water_h) / 2;
break;
case 7:
posX = 0;
posY = (info->height - water_h);
break;
case 8:
posX = (info->width - water_w) /2;
posY = info->width - water_h;
break;
case 9:
posX = info->width - water_w;
posY = info->height - water_h;
break;
default:
posX = info->width - water_w;
posY = info->height - water_h;
break;
}
if(info->water_type == 0)
{
gdImagePtr tmp_im;
tmp_im = NULL;
tmp_im = gdImageCreateTrueColor(water_w, water_h);
gdImageCopy(tmp_im, info->dst_im, 0, 0, posX, posY, water_w, water_h);
gdImageCopy(tmp_im, info->water_im, 0, 0, 0, 0, water_w, water_h);
gdImageCopyMerge(info->dst_im, tmp_im,posX, posY, 0, 0, water_w,water_h,info->water_transparent);
gdImageDestroy(tmp_im);
gdImageDestroy(info->water_im);
info->water_im = NULL;
}
else
{
gdImageAlphaBlending(info->dst_im,-1);
gdImageSaveAlpha(info->dst_im,0);
gdImageStringFT(info->dst_im,0,water_color,water_font,info->water_font_size, 0.0, posX, posY,water_text);
}
}
}
static int parse_image_info(void *conf)
{
void *(*old_pcre_malloc)(size_t);
void (*old_pcre_free)(void *);
pcre *expr;//正则
char *pattern;
const char *error;//正则错误内容
int pcre_state=0;//匹配图片规则状态,0为成功 -1为失败
int erroffset;//正则错误位置
int ovector[30];//识别器读取原图图片到GD对象
int expr_res;//正则匹配指针
int i=0;//循环用
ngx_image_conf_t *info = conf;
info->request_filename = NULL;
old_pcre_malloc = pcre_malloc;
old_pcre_free = pcre_free;
pcre_malloc = malloc;
pcre_free = free;
PRINT_LOG(NGX_LOG_ERR, info->request->connection->log, "FUNC parse_image_info \n");
if(strchr(info->dest_file,'!'))
{
info->pcre_type = 0;
//pattern = "([^<]*)!([a-z])(\\d{2,4})x(\\d{2,4}).([a-zA-Z]{3,4})";//正则表达式
pattern = "([^<]*)\\/([^<]*)!([a-z])(\\d{2,4})x(\\d{2,4}).([a-zA-Z]{3,4})";//正则表达式
}
else
{
info->pcre_type = 1;
//pattern = "([^<]*).([a-z])(\\d{2,4})x(\\d{2,4}).([a-zA-Z]{3,4})";//正则表达式
pattern = "([^<]*)\\/([^<]*).([a-z])(\\d{2,4})x(\\d{2,4}).([a-zA-Z]{3,4})";//正则表达式
}
expr = pcre_compile((const char *)pattern,0,&error,&erroffset,NULL);
if(expr != NULL)
{
expr_res = pcre_exec(expr,NULL,(const char *)info->dest_file,ngx_strlen(info->dest_file),0,0,ovector,30);
PRINT_LOG(NGX_LOG_ERR, info->request->connection->log,
"FUNC parse_image_info, expr_res=%d\n", expr_res);
//printf("parse_image_info dest_file=%s,%ld\n", (const char *)info->dest_file, ngx_strlen(info->dest_file));
if (expr_res > 5)
{
for(i=0; i<expr_res; i++)
{
char *substring_start = info->dest_file + ovector[2*i];
int substring_length = ovector[2*i+1] - ovector[2*i];
sprintf(info->buffer[i],"%.*s",substring_length,substring_start);
//printf("parse_image_info buff[%d] : %d %s\n",i,substring_length,substring_start);
}
info->source_file = info->buffer[1];
if(info->pcre_type == 1)
{
/** combind source_file **/
strcat(info->source_file,"/");
strcat(info->source_file, info->buffer[2]);
strcat(info->source_file,".");
strcat(info->source_file, info->buffer[expr_res-1]);
/** combind request_filename **/
info->request_filename = info->buffer[2];
strcat(info->request_filename,".");
strcat(info->request_filename, info->buffer[expr_res-1]);
}
else
{
/** combind source_file **/
strcat(info->source_file,"/");
strcat(info->source_file,info->buffer[2]);
/** combind request_filename **/
info->request_filename = info->buffer[2];
}
dirname(info->buffer[1],info->local_dir);
info->dest_file = info->buffer[0];
info->m_type = info->buffer[3];
info->max_width = atoi(info->buffer[4]); //超大时会出错
info->max_height = atoi(info->buffer[5]);
info->max_width = (info->max_width > 2000) ? 2000 : (info->max_width); //限定最大值
info->max_height = (info->max_height > 2000) ? 2000 : info->max_height;
PRINT_LOG(NGX_LOG_ERR, info->request->connection->log,
"FUNC parse_image_info, info->dest_file= %s, info->local_dir= %s, info->source_file = %s, "
"info->m_type = %s, info->max_width = %d, info->max_height = %d, info->request_filename = %s \n",
info->dest_file, info->local_dir, info->source_file,
info->m_type, info->max_width, info->max_height, info->request_filename);
if((info->max_width < 0) || (info->max_height < 0))
{
//如果图片小于0，则可以判断请求无效了
pcre_free(expr);
pcre_malloc = old_pcre_malloc;
pcre_free = old_pcre_free;
return -1;
}
if(file_exists(info->source_file) == -1)//原图不存在
{
download(conf);
}
PRINT_LOG(NGX_LOG_ERR, info->request->connection->log,
"FUNC parse_image_info, info->dest_file= %s, info->local_dir= %s, info->source_file = %s \n",
info->dest_file, info->local_dir, info->source_file);
if(file_exists(info->source_file) == 0)
{
pcre_state = calc_image_info(conf);
pcre_free(expr);
pcre_malloc = old_pcre_malloc;
pcre_free = old_pcre_free;
return pcre_state;
}
}
pcre_free(expr);
//恢复Nginx默认PCRE内存分配
pcre_malloc = old_pcre_malloc;
pcre_free = old_pcre_free;
//END
}
return -1;
}
static int calc_image_info(void *conf)
{
ngx_image_conf_t *info = conf;
info->src_type = get_ext_header(info->source_file);//读取原图头部信息金星判断图片格式
if( info->src_type > 0)
{
info->w_margin = 0;//设置默认图片不补白边
info->src_im = NULL;
info->dst_im = NULL;
info->w_im = NULL;
image_from(conf);//读取原图图片到GD对象
if(info->src_im != NULL)
{
info->src_width = info->src_im->sx;
info->src_height = info->src_im->sy;
info->src_x = 0;
info->src_y = 0;
info->dst_x = 0;
info->dst_y = 0;
info->src_w = info->src_width;
info->src_h = info->src_height;
info->width = info->max_width;
info->height = info->max_height;
if(stricmp(info->m_type,"c") == 0 || stricmp(info->m_type,"m") == 0)
{
if((double)info->src_width/info->src_height > (double)info->max_width / info->max_height)
{
info->src_w=info->width * info->src_height / info->height;
if(stricmp(info->m_type,"m") == 0)
{
info->src_x=(info->src_width-info->src_w)/2;
}
else
{
info->src_x=(info->src_width-info->src_w)*0.1;
}
}
else
{
info->src_h=info->src_w * info->height / info->width;
if(stricmp(info->m_type,"m") == 0)
{
info->src_y=(info->src_height-info->src_h)/2;
}
else
{
info->src_y=(info->src_height-info->src_h)*0.1;
}
}