[1].[文件] cgi.h ~ 405B 下载(105) 跳至 [1] [2] [3] [4] [5] [6] [7] [8]
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 | #ifndef CGI_H #define CGI_H #include <stdio.h> #include <string.h> #include <stdlib.h> typedef struct Node{ char *name; char *value; struct Node *next; }Node; typedef struct Index{ Node *head; char *buffer; }Index; Index *get_input(); void free_input(Index *); Node *analyze( char *); Node *analy_a( char *); Node *analy_m( char *, char *); char *get_value(Node *, char *); char fun1( char ); #endif |
[2].[文件] get_input.c ~ 965B 下载(85) 跳至 [1] [2] [3] [4] [5] [6] [7] [8]
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 | #include "cgi.h" Index *get_input() { //获得表单发送方法 char *get_method = getenv ( "REQUEST_METHOD" ); Index *input = (Index *) malloc ( sizeof (Index)); Node *head; char *buffer; if ( strcmp (get_method, "GET" ) == 0) { char *get_str = getenv ( "QUERY_STRING" ); if (get_str == NULL || *get_str == 0) { return NULL; } //get方法,通过环境变量得到内容 buffer = ( char *) malloc ( strlen (get_str) + 1); strcpy (buffer, get_str); //对内容进行解析,以链表的形式存在 head = analy_a(buffer); } else if ( strcmp (get_method, "POST" ) == 0){ int get_len = atoi ( getenv ( "CONTENT_LENGTH" )); if (get_len == 0) { return NULL; } //post方法,通过标准输入读取内容 buffer = ( char *) malloc (get_len + 1); memset (buffer,0,get_len + 1); int n = fread (buffer, 1,get_len, stdin); if (n != get_len) { fprintf (stderr, "Read error!" ); } head = analyze(buffer); } //链表头 input -> head = head; //接受到的字符串 input -> buffer = buffer; return input; } |
[3].[文件] analyze.c ~ 610B 下载(81) 跳至 [1] [2] [3] [4] [5] [6] [7] [8]
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | #include "cgi.h" //post方法获取的内容进行解析 Node *analyze( char *buffer) { //获取内容格式 char *c_type = getenv ( "CONTENT_TYPE" ); char *bound; fprintf (stderr, "debug:c_type is %s\n" ,c_type); if ( strcmp ( "application/x-www-form-urlencoded" ,c_type) == 0) { //该格式表明获取内容为"name=value"形式 return analy_a(buffer); } else if ( strcmp ( "text/plain" , c_type) == 0) { //此种编码格式暂不讨论 } else { //编码格式为multipart/form-data,适用大流量数据传送 //获取等号后面的分隔符 bound = index(c_type, '=' ) + 1; fprintf (stderr, "debug:bound is %s\n" ,bound); return analy_m(buffer, bound); } } |
[4].[文件] analy_a.c ~ 961B 下载(78) 跳至 [1] [2] [3] [4] [5] [6] [7] [8]
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 | #include "cgi.h" //编码格式为'application/x-www-form-urlencoded'的内容 Node *analy_a( char *buffer) { //创建第一个节点 Node *head = (Node *) malloc ( sizeof (Node)); Node *temp = head; temp -> name = buffer; char *b_temp = buffer; //通过移动、改变部分字符来分离字符串 while (*buffer != 0) { if (*buffer == '=' ) { //'=',则表示name已经结束,value将开始 *b_temp = 0; temp -> value = b_temp + 1; } else if (*buffer == '+' ) { //'+'代表空格 *b_temp = ' ' ; } else if (*buffer == '%' ) { //'%'则紧跟两位十六进制表示的特殊字符 *b_temp = fun1(*(buffer + 1)) * 16 + fun1(*(buffer + 2)); buffer += 2; } else if (*buffer == '&' ) { //'&'表示value已经结束,name即将开始 *b_temp = 0; //重新申请内存,存储新内容地址 temp -> next = (Node *) malloc ( sizeof (Node)); temp = temp -> next; temp -> name = b_temp + 1; } else { *b_temp = *buffer; } buffer++; b_temp++; } //最后一个结束符 *b_temp = 0; return head; } |
[5].[文件] analy_m.c ~ 1KB 下载(80) 跳至 [1] [2] [3] [4] [5] [6] [7] [8]
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 | #include "cgi.h" //编码格式为'multipart/form-data'的内容 Node *analy_m( char *buffer, char *bound) { char *start; char *end; //第一个节点 Node *head = (Node*) malloc ( sizeof (Node)); Node *temp = head; fprintf (stderr, "debug:buffer is %s\n" , buffer); //开始解析内容,name在两个双引号之间(详见编码格式) temp -> name = index(buffer, '"' ) + 1; end = index(temp -> name, '"' ); *end = 0; fprintf (stderr, "debug:temp->name is %s\n" , temp -> name); //中间间隔了两个"\r\n" temp -> value = end + 5; buffer = strstr (temp -> value, bound); //到下一个间隔符,上面间隔两个"\r\n" *(buffer - 4) = 0; fprintf (stderr, "debug:temp->valu is %s\n" , temp -> value); while ((start = strstr (buffer, "name=" )) != NULL) { //循环获取name与value地址,直到没有name为止 temp -> next = (Node *) malloc ( sizeof (Node)); temp = temp -> next; temp -> name = index(start, '"' ) + 1; end = index(temp -> name, '"' ); *end = 0; fprintf (stderr, "debug:temp->name is %s\n" , temp -> name); temp -> value = end + 5; buffer = strstr (temp -> value, bound); *(buffer - 4) = 0; fprintf (stderr, "debug:temp->valu is %s\n" , temp -> value); } return head; } |
[6].[文件] fun1.c ~ 203B 下载(76) 跳至 [1] [2] [3] [4] [5] [6] [7] [8]
1 2 3 4 5 6 7 8 9 10 11 12 13 | //将十六进制字符转化为十进制数 char fun1( char ch) { char buffer; if (ch < 'A' ) { buffer = ch - 48; } else if (ch < 'a' ){ buffer = ch - 55; } else { buffer = ch - 87; } return buffer; } |
[7].[文件] get_value.c ~ 241B 下载(77) 跳至 [1] [2] [3] [4] [5] [6] [7] [8]
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | #include "cgi.h" //根据name获取相应的value char *get_value(Node *head, char *name) { Node *p; while (head != NULL) { if ( strcmp (head -> name, name) == 0) { return head -> value; } p = head -> next; head = p; } return NULL; } |
[8].[文件] free_input.c ~ 222B 下载(79) 跳至 [1] [2] [3] [4] [5] [6] [7] [8]
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | #include "cgi.h" //释放动态获取的内存 void free_input(Index *index) { Node *temp = index -> head; Node *p; while (temp != NULL) { p = temp -> next; free (temp); temp = p; } free (index -> buffer); free (index); } |