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[downloader] Update image URI in response to a redirection 

Update the image's recorded URI when a download redirection occurs.
This ensures that URIs relative to a redirected download are resolved
correctly.

In particular, this allows for the use of relative URIs in scripts
that are themselves downloaded via a redirection, such as the HTTP 301
redirection used to fix up URIs pointing to directories but omitting
the trailing slash (e.g. "http://boot.ipxe.org/demo", which will be
redirected to "http://boot.ipxe.org/demo/").

Signed-off-by: Michael Brown <mcb30@ipxe.org>
pull/43/head
Michael Brown 2016-01-09 13:23:13 +00:00
parent 57fa0db03f
commit a8bef53908
1 changed files with 41 additions and 6 deletions
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47
src/core/downloader.c
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@ -136,9 +136,9 @@ static int downloader_progress ( struct downloader *downloader,
* @v meta Data transfer metadata
* @ret rc Return status code
*/
static int downloader_xfer_deliver ( struct downloader *downloader,
struct io_buffer *iobuf,
struct xfer_metadata *meta ) {
static int downloader_deliver ( struct downloader *downloader,
struct io_buffer *iobuf,
struct xfer_metadata *meta ) {
int rc;
/* Add data to buffer */
@ -160,16 +160,51 @@ static int downloader_xfer_deliver ( struct downloader *downloader,
* @ret xferbuf Data transfer buffer, or NULL on error
*/
static struct xfer_buffer *
downloader_xfer_buffer ( struct downloader *downloader ) {
downloader_buffer ( struct downloader *downloader ) {
/* Provide direct access to underlying data transfer buffer */
return &downloader->buffer;
}
/**
* Redirect data transfer interface
*
* @v downloader Downloader
* @v type New location type
* @v args Remaining arguments depend upon location type
* @ret rc Return status code
*/
static int downloader_vredirect ( struct downloader *downloader, int type,
va_list args ) {
va_list tmp;
struct uri *uri;
int rc;
/* Intercept redirects to a LOCATION_URI and update the image URI */
if ( type == LOCATION_URI ) {
/* Extract URI argument */
va_copy ( tmp, args );
uri = va_arg ( tmp, struct uri * );
va_end ( tmp );
/* Set image URI */
if ( ( rc = image_set_uri ( downloader->image, uri ) ) != 0 )
return rc;
}
/* Redirect to new location */
if ( ( rc = xfer_vreopen ( &downloader->xfer, type, args ) ) != 0 )
return rc;
return 0;
}
/** Downloader data transfer interface operations */
static struct interface_operation downloader_xfer_operations[] = {
INTF_OP ( xfer_deliver, struct downloader *, downloader_xfer_deliver ),
INTF_OP ( xfer_buffer, struct downloader *, downloader_xfer_buffer ),
INTF_OP ( xfer_deliver, struct downloader *, downloader_deliver ),
INTF_OP ( xfer_buffer, struct downloader *, downloader_buffer ),
INTF_OP ( xfer_vredirect, struct downloader *, downloader_vredirect ),
INTF_OP ( intf_close, struct downloader *, downloader_finished ),
};