C cgi jpeg transmission howto 1

[Guest_imported]

could someone show me a example of how to send a jpeg format picture through apache? I have searched all over the web but I can't seem to find any examples of this. I've tried a few different things but none of them seem to work Thanks.

 

[rbobbitt]

I don't know what you mean. Are you writing a CGI program in C to process .jpeg files and using the Apache web server? Try to be more specific about your problem.

Russ
bobbitts@hotmail.com

http://home.earthlink.net/~bobbitts

 

[Guest_imported]

I just want a counter program to run when people access index.html. I have decided to get this to run by adding an img src=pic.cgi tag. That way I can get it to run when people go to my site. I am using Apache on slackware linux. All I want it to do is display a pic on index.html, but I could not find any information on how to do that on the internet. I know you need printf("Content-type: image/jpeg\n\n" but I do not know what is suppost to come after that to get it to send, and display on the page.... That is what I was asking. Does this make sense??

 

[rbobbitt]

First you have to print HTTP response header (the last line is followed by two newline characters), which you seem to know.

To write the image, In C, you could just open the image file for reading in binary mode and then write each byte read to stdout. Here's a rough idea:

#include <stdio.h>

/* ... */

int main(void)
{
FILE *fp
unsigned char buf[1];

/* Write HTTP response header */

fp=fopen(&quot;whatever.jpg&quot;,&quot;rb&quot;
if (fp!=NULL) {
while (fread(&buf,1,1,fp)) {
fwrite(&buf,1,1,stdout);
}
fclose(fp);
}
return 0;
}

Russ
bobbitts@hotmail.com

http://home.earthlink.net/~bobbitts