我是一名正在做 Web 服务器练习的学生,我需要一些帮助。
我的网络服务器在文本页面上运行良好,但每当浏览器发送---GET /img.jpg HTTP/1.1
请求时,我不知道如何处理它。我听说 HTTP 协议是基于文本的,那么如何在我的 HTTP 响应中发送图像?
这是我创建正常 HTTP 响应的部分,我计划用它readresult == 2
来表示图像。
if(readresult == 1){
sprintf(toreturn, "%s\r\n%s\r\n%s\r\n\r\n%s", "HTTP/1.1 200 OK", "Content-Type: text/html", "Connection: close", readpagestring);
returnflag = 1;
}
else if(readresult == 2){
returnflag = 2;
}
else{
sprintf(toreturn, "%s\r\n%s\r\n%s\r\n\r\n%s", "HTTP/1.1 404 Not Found", "Content-Type: text/html", "Connection: close", readpagestring);
returnflag = 0;
}
以及它调用的函数
int readpage(char *readaddress, char *pagereturn){
FILE *inputfile = (FILE *)calloc(1,sizeof(FILE));
int flag;
int c;
int n = 0;
readaddress++;
inputfile=fopen(readaddress,"r");
if (inputfile==NULL){
FILE *missingfile;
missingfile=fopen("404.html","r");
while ((c = fgetc (missingfile)) != EOF){
*(pagereturn+n) = c;
n++;
}
flag = 0;
fclose (missingfile);
}
else{
while ((c = fgetc (inputfile)) != EOF){
*(pagereturn+n) = c;
n++;
}
flag = 1;
fclose (inputfile);
}
return flag;
}