CGI C上傳文件以及大小限制修改
1、修改源代碼的defines.h裏面的宏SINGLE_POST_LIMIT_DEFAULT
2、修改boa.conf裏面的SinglePostLimit
cgic文件命令爲：upload.c
#include<stdio.h>
#include<string.h>
#include<unistd.h>
#include<fcntl.h>
#include<sys/stat.h>
#include"cgic.h"
#define BufferLen 1024
int cgiMain(void){
cgiFilePtr file;
int targetFile;
mode_t mode;
char name[128];
char fileNameOnServer[64];
char contentType[1024];
char buffer[BufferLen];
char *tmpStr=NULL;
int size;
int got,t;
cgiHeaderContentType("text/html");
//取得html頁面中file元素的值，應該是文件在客戶機上的路徑名
if (cgiFormFileName("file", name, sizeof(name)) !=cgiFormSuccess) {
fprintf(stderr,"could not retrieve filename\n");
goto FAIL;
}
cgiFormFileSize("file", &size);
//取得文件類型，不過本例中並未使用
cgiFormFileContentType("file", contentType, sizeof(contentType));
//目前文件存在於系統臨時文件夾中，通常爲/tmp，通過該命令打開臨時文件。臨時文件的名字與用戶文件的名字不同，所以不能通過路徑/tmp/userfilename的方式獲得文件
if (cgiFormFileOpen("file", &file) != cgiFormSuccess) {
fprintf(stderr,"could not open the file\n");
goto FAIL;
}
t=-1;
//從路徑名解析出用戶文件名
while(1){
tmpStr=strstr(name+t+1,"\\");
if(NULL==tmpStr)
tmpStr=strstr(name+t+1,"/");//if "\\" is not path separator, try "/"
if(NULL!=tmpStr)
t=(int)(tmpStr-name);
else
break;
}
strcpy(fileNameOnServer,"./getfile/");
strcat(fileNameOnServer,name+t+1);
mode=S_IRWXU|S_IRGRP|S_IROTH;
//在當前目錄下建立新的文件，第一個參數實際上是路徑名，此處的含義是在cgi程序所在的目錄（當前目錄））建立新文件
targetFile=open(fileNameOnServer,O_RDWR|O_CREAT|O_TRUNC|O_APPEND,mode);
if(targetFile<0){
fprintf(stderr,"could not create the new file,%s\n",fileNameOnServer);
goto FAIL;
}
//從系統臨時文件中讀出文件內容，並放到剛創建的目標文件中
while (cgiFormFileRead(file, buffer, BufferLen, &got) ==cgiFormSuccess){
if(got>0)
write(targetFile,buffer,got);
}
cgiFormFileClose(file);
close(targetFile);
goto END;
FAIL:
fprintf(stderr,"Failed to upload");
return 1;
END:
printf("File \"%s\" has been uploaded",fileNameOnServer);
return 0;
}
html文件命名爲：upload.html
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Test Upload</title>
<meta name="author" content="Jack">
<!-- Date: 2007-08-30 -->
</head>
<body>
<form action="cgi-bin/upload.cgi" method="post" enctype="multipart/form-data" target="_blank">
<input type="file" name="file" value="" />
<input type="submit" name="submit" value="OK">
</form>
</body>
</html>
編譯：gcc -Wall upload.c cgic.c -o upload.cgi