Web server
[Example applications]

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Detailed Description

The uIP web server is a very simplistic implementation of an HTTP server. It can serve web pages and files from a read-only ROM filesystem, and provides a very small scripting language.

The script language is very simple and works as follows. Each script line starts with a command character, either "i", "t", "c", "#" or ".". The "i" command tells the script interpreter to "include" a file from the virtual file system and output it to the web browser. The "t" command should be followed by a line of text that is to be output to the browser. The "c" command is used to call one of the C functions from the httpd-cgi.c file. A line that starts with a "#" is ignored (i.e., the "#" denotes a comment), and the "." denotes the last script line.

The script that produces the file statistics page looks somewhat like this:

i /header.html
t <h1>File statistics</h1><br><table width="100%">
t <tr><td><a href="/index.html">/index.html</a></td><td>
c a /index.html
t </td></tr> <tr><td><a href="/cgi/files">/cgi/files</a></td><td>
c a /cgi/files
t </td></tr> <tr><td><a href="/cgi/tcp">/cgi/tcp</a></td><td>
c a /cgi/tcp
t </td></tr> <tr><td><a href="/404.html">/404.html</a></td><td>
c a /404.html
t </td></tr></table>
i /footer.plain
.

Files
file	cgi.c
	HTTP server script language C functions file.
file	cgi.h
	HTTP script language header file.
file	fs.c
	HTTP server read-only file system code.
file	fs.h
	HTTP server read-only file system header file.
file	httpd.c
	HTTP server.
file	httpd.h
	HTTP server header file.
Data Structures
struct	fs_file
	An open file in the read-only file system. More...
Functions
void	httpd_init (void)
	Initialize the web server.
int	fs_open (const char *name, struct fs_file *file)
	Open a file in the read-only file system.
void	fs_init (void)
	Initialize the read-only file system.
Variables
cgifunction	cgitab []
	A table containing pointers to C functions that can be called from a web server script.

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Function Documentation

int fs_open (  const char *  name, struct fs_file *  file )

Open a file in the read-only file system. Parameters: name  The name of the file. file  The file pointer, which must be allocated by caller and will be filled in by the function.

void httpd_init (  void   )

Initialize the web server. Starts to listen for incoming connection requests on TCP port 80.

Here is the call graph for this function:

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