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use std ::io ::{ Write , BufReader , BufRead } ;
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use std ::net ::{ TcpListener , TcpStream } ;
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use std ::fs ;
use std ::string ::{ String } ;
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fn check_if_path_exists ( path : String ) -> bool {
// This is probably not the best way of checking if a path
// exists but I don't care :)
let file = fs ::metadata ( path ) ;
match file {
Ok ( _ ) = > true ,
Err ( _ ) = > false ,
}
}
fn check_if_dir ( directory : String ) -> bool {
let path = directory + " /index.html " ;
let result = check_if_path_exists ( path ) ;
return result ;
}
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fn get_page ( filename : String ) -> String {
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// The loaded page should be left immutable as it does
// not need to be modified by the server.
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if filename = = " .error_server_404 " {
let result = " <!DOCTYPE HTML><html><body><h1>404 Not Found</h1><p>The resource you are trying to locate cannot be accessed!</p></body></html> " ;
return result . to_string ( ) ;
} else if filename = = " .error_server_503 " {
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let result = " <!DOCTYPE HTML><html><body><h1>503 Not Implemented</h1><p>The request sent by your web browser cannot be handled by this server software.</p></body></html> " ;
return result . to_string ( ) ;
} else {
let result = fs ::read_to_string ( filename ) ;
match result {
Ok ( i ) = > i . to_string ( ) ,
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Err ( _e ) = > " <!DOCTYPE HTML><html><body><h1>403 Forbidden</h1><p>The resource you are trying to access cannot be read by the server.</p></body></html> " . to_string ( ) ,
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}
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}
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}
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fn process_request ( request : Vec < u8 > ) -> String {
let mut input = String ::from_utf8_lossy ( & request ) . to_string ( ) ;
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let mut index = String ::new ( ) ;
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let output ;
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if input . contains ( " GET " ) {
// To-do: find a less atrocious way to do this.
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println! ( " Stream sent GET request. " ) ;
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input = input . replace ( " GET " , " " ) ;
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input = input . replace ( " HTTP/1.1 \r \n " , " " ) ;
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// Theoretically by this point, the request
// will have been cut down to just the
// requested resource, but in my experience
// this code is gonna result in like 50k errors
// and I'm gonna have to rewrite it to get it
// to actually work the way I want it to.
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if input ! = " / " {
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let mut chars = input . chars ( ) ;
chars . next ( ) ;
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let path = chars . as_str ( ) . to_string ( ) ;
let exists = check_if_path_exists ( path ) ;
if exists = = false {
output = " .error_server_404 " ;
} else {
let path = chars . as_str ( ) . to_string ( ) ;
let dir = check_if_dir ( path ) ;
if dir = = true {
let path = chars . as_str ( ) . to_string ( ) ;
index + = & path ;
index + = " /index.html " ;
output = index . as_str ( ) . clone ( ) ;
} else {
output = chars . as_str ( ) ;
}
}
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} else {
output = " index.html " ;
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}
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} else {
// It's get_page()'s problem now.
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println! ( " Stream sent unhandlable request. " ) ;
output = " .error_server_503 " ;
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}
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// Did you want to see chars.as_str().to_string()?
return output . to_string ( ) ;
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}
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fn serve ( mut stream : TcpStream ) {
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let mut request = Vec ::new ( ) ;
let mut reader = BufReader ::new ( & mut stream ) ;
reader
. read_until ( b '\n' , & mut request )
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. expect ( " Failed to read from stream! " ) ;
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let resource = process_request ( request ) ;
let contents = get_page ( resource ) ;
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let header = " HTTP/1.1 200 OK \r \n \r \n " ;
let response = format! ( " {} {} " , header , contents ) ;
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stream . write ( response . as_bytes ( ) ) . unwrap ( ) ;
stream . flush ( ) . unwrap ( ) ;
}
fn main ( ) -> std ::io ::Result < ( ) > {
let listen = TcpListener ::bind ( " 127.0.0.1:8080 " ) ? ;
for stream in listen . incoming ( ) {
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println! ( " Serving incoming stream. " ) ;
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serve ( stream ? ) ;
}
Ok ( ( ) )
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}
