Allow URLs and URL selectors > 255 chars.

Note: The URL selector is stored in the output_buffer - which is currently 520 bytes. Beside all of the URL (apart from a potential "http://") the 'get' and the 'http_preamble' have to fit into that buffer. Therefore URLs mustn't exceed 450 chars. However, we omit a check to avoid further code size increase as most of the time URLs are known to be much shorter anyhow. If the URLs might become large we just leave it up to the user to check their length.

inc/ip65.h

@@ -299,6 +299,7 @@ extern char*    url_selector;   // Zero terminated string containing selector pa
 
 // Download a resource specified by an HTTP URL
 //
+// The URL mustn't be longer than 450 chars.
 // On success the resource is zero terminated.
 //
 // Inputs: url: Zero (or ctrl char) terminated string containing the URL

ip65/download.s

@@ -47,6 +47,7 @@ TIMEOUT_SECONDS = 15
 .code
 
 ; download a resource specified by an URL
+; caution - the selector built from the URL must fit into the output_buffer !!!
 ; inputs:
 ; AX = address of URL string
 ; url_download_buffer - points to a buffer that url will be downloaded into

ip65/url.s

@@ -42,6 +42,7 @@ selector_buffer = output_buffer
 .code
 
 ; parses a URL into a form that makes it easy to retrieve the specified resource
+; caution - the resulting selector part of URL must fit into the output_buffer !!!
 ; inputs:
 ; AX = address of URL string
 ; any control character (i.e. <$20) is treated as 'end of string', e.g. a CR or LF, as well as $00
@@ -162,11 +163,15 @@ lda #url_type_gopher
   cmp #$20
   bcc @end_of_selector          ; any control char (including CR,LF, and $00) should be treated as end of URL
   inc src_ptr
+  bne @save_first_byte_of_selector
+  inc ptr1+1
 @save_first_byte_of_selector:
   ldy dest_ptr
   sta (ptr2),y
   inc dest_ptr
   bne @copy_one_byte
+  inc ptr2+1
+  jmp @copy_one_byte
 @end_of_selector:
   ldx #1                        ; number of CRLF at end of gopher request
   lda url_type
@@ -177,18 +182,24 @@ lda #url_type_gopher
   ; now the HTTP version number & Host: field
   ldx #0
 : lda http_preamble,x
-  beq :+
+  beq :++
   ldy dest_ptr
-  inc dest_ptr
   sta (ptr2),y
-  inx
-  bne :-
+  inc dest_ptr
+  bne :+
+  inc ptr2+1
+: inx
+  bne :--
 : ; now copy the host field
+  lda ptr2+1
+  pha
   jsr skip_to_hostname
   ; AX now pointing at hostname
   stax ptr1
-  ldax #selector_buffer
-  stax ptr2
+  ldax #<selector_buffer
+  sta ptr2
+  pla
+  sta ptr2+1
 
   lda #0
   sta src_ptr
@@ -206,6 +217,8 @@ lda #url_type_gopher
   sta (ptr2),y
   inc dest_ptr
   bne @copy_one_byte_of_hostname
+  inc ptr2+1
+  jmp @copy_one_byte_of_hostname
 @end_of_hostname:
   ldx #2                        ; number of CRLF at end of HTTP request
 
@@ -214,10 +227,14 @@ lda #url_type_gopher
   lda #$0d
   sta (ptr2),y
   iny
-  lda #$0a
+  bne :+
+  inc ptr2+1
+: lda #$0a
   sta (ptr2),y
   iny
-  sty dest_ptr
+  bne :+
+  inc ptr2+1
+: sty dest_ptr
   dex
   bne @final_crlf