标签：variables var bsp stdin type 指定 version begin nginx
请求
NGINX ->[
{(post data) +> (NGX_HTTP_FASTCGI_STDIN)} * N +>
{(environment variables) +> (NGX_HTTP_FASTCGI_PARAMS)} * N +>
(角色和连接设置) +>
(NGX_HTTP_FASTCGI_BEGIN_REQUEST)
] -> fastCGI
NGX_HTTP_FASTCGI_BEGIN_REQUEST : 第一个发送出去的 ngx_http_fastcgi_header_t
角色和连接设置 : ngx_http_fastcgi_begin_request_t结构体
NGX_HTTP_FASTCGI_PARAMS : 环境变量 ,可能有N个
environment variables : 环境变量具体数据包括请求的url use_agent 等等,可能有N个,长度由NGX_HTTP_FASTCGI_PARAMS中的content_length_*指定
NGX_HTTP_FASTCGI_STDIN : 提交的数据 ,可能有N个,
post data : post 上来的数据,可能有N个,长度由NGX_HTTP_FASTCGI_STDIN中的content_length_*指定
数据结构
#define NGX_HTTP_FASTCGI_BEGIN_REQUEST 1
#define NGX_HTTP_FASTCGI_ABORT_REQUEST 2
#define NGX_HTTP_FASTCGI_END_REQUEST 3
#define NGX_HTTP_FASTCGI_PARAMS 4
#define NGX_HTTP_FASTCGI_STDIN 5
#define NGX_HTTP_FASTCGI_STDOUT 6
#define NGX_HTTP_FASTCGI_STDERR 7
#define NGX_HTTP_FASTCGI_DATA 8
typedef struct {
u_char version; //标识FastCGI协议版本 一般为 1
u_char type; //参考上面的宏定义 NGX_HTTP_FASTCGI_*
u_char request_id_hi; //请求id
u_char request_id_lo;
u_char content_length_hi; //请求内容长度
u_char content_length_lo;
u_char padding_length; //填充长度
u_char reserved;
} ngx_http_fastcgi_header_t;
typedef struct {
u_char role_hi; //角色id
u_char role_lo;
u_char flags; // 0 请求完毕后关闭连接 1 请求接收后保持连接
u_char reserved[5];
} ngx_http_fastcgi_begin_request_t;
fastCGI 接收请求样例
memcpy(&fh,recvBuf+0,sizeof(ngx_http_fastcgi_header_t));//FCGI_BEGIN_REQUEST memcpy(&fb,recvBuf+sizeof(ngx_http_fastcgi_header_t),sizeof(ngx_http_fastcgi_begin_request_t)); memcpy(&fp,recvBuf+sizeof(ngx_http_fastcgi_header_t)+sizeof(ngx_http_fastcgi_begin_request_t),sizeof(ngx_http_fastcgi_header_t));//FCGI_PARAMS int paramLen = fp.contentLengthB1*256+fp.contentLengthB0; //816 char paramBuf[1024]; memcpy(paramBuf,recvBuf+sizeof(ngx_http_fastcgi_header_t)*2+sizeof(ngx_http_fastcgi_begin_request_t),paramLen);//environment variables memcpy(&fp,recvBuf+sizeof(ngx_http_fastcgi_header_t)*2+sizeof(ngx_http_fastcgi_begin_request_t)+paramLen,sizeof(ngx_http_fastcgi_header_t));//FCGI_PARAMS memcpy(&fp,recvBuf+sizeof(ngx_http_fastcgi_header_t)*3+sizeof(ngx_http_fastcgi_begin_request_t)+paramLen,sizeof(ngx_http_fastcgi_header_t));//FCGI_STDIN
响应
fastCGI ->[
(NGX_HTTP_FASTCGI_END_REQUEST) +>
{(response error data) +> (NGX_HTTP_FASTCGI_STDERR)} * N +>
{(response data) +> (NGX_HTTP_FASTCGI_STDOUT)} * N +>
] -> NGINX
NGX_HTTP_FASTCGI_STDOUT : 输出的正常内容，可能有N个
response data : 相应的数据，长度由NGX_HTTP_FASTCGI_STDOUT中的content_length_*指
NGX_HTTP_FASTCGI_STDERR : 输出的报错内容，可能有N个
response error data : 相应的数据，长度由NGX_HTTP_FASTCGI_STDERR中的content_length_*指
NGX_HTTP_FASTCGI_END_REQUEST : 标识本次响应结束
fastCGI 接收样例
char sendBuf[1024]; char response[]="HTTP/1.1 200 OK\r\nContent-Type:text/html\r\nContent-Length: 7\r\n\r\nWelcome"; fStdout.version=1; fStdout.type=6;//FCGI_STDOUT fStdout.requestIdB1=0; fStdout.requestIdB0=1; fStdout.contentLengthB1=0; fStdout.contentLengthB0=strlen(response); fStdout.paddingLength=0; fStdout.reserved=0; fStderr=fStdout; fStderr.type=7;//FCGI_STDERR fStderr.contentLengthB0=0; fEnd = fStderr; fEnd.type=3;//FCGI_END_REQUEST memcpy(sendBuf,&fStdout,sizeof(ngx_http_fastcgi_header_t)); memcpy(sendBuf+sizeof(ngx_http_fastcgi_header_t),response,strlen(response)); memcpy(sendBuf+sizeof(ngx_http_fastcgi_header_t)+strlen(response),&fStderr,sizeof(ngx_http_fastcgi_header_t)); memcpy(sendBuf+sizeof(ngx_http_fastcgi_header_t)*2+strlen(response),&fEnd,sizeof(ngx_http_fastcgi_header_t)); send(sockConnection, sendBuf, sizeof(ngx_http_fastcgi_header_t)*3+strlen(response),0);
标签：variables var bsp stdin type 指定 version begin nginx
原文地址：http://www.cnblogs.com/ruanjianxian/p/7646868.html
