Scanning From Web Pages
On Android, you can invoke Barcode Scanner from a web page and have the result returned to your site via a callback URL. For example, when 01234
is scanned, to have the user return to http://foo.com/products/01234/description
, simply link to a URL like this, where {CODE}
is a placeholder for the value of the returned code:
http://zxing.appspot.com/scan?ret=http%3A%2F%2Ffoo.com%2Fproducts%2F%7BCODE%7D%2Fdescription&SCAN_FORMATS=UPC_A,EAN_13
Note that the URL in the ret=
parameter is URL-escaped, and that {CODE}
is used as a placeholder for the scanned value (above, it appears as %7BCODE%7D
). SCAN_FORMATS
, and other parameters, can be set here as well to control the scan behavior. For example is can be used to supply a comma-separated list of format names.
Additional placeholders are available in the URL pattern:
-
{CODE}
: the formatted content of the barcode, or the raw content (unparsed) ifraw=true
-
{RAWCODE}
: the raw content (unparsed) -
{FORMAT}
: the name of the barcode format scanned likeUPC_A
-
{TYPE}
: the name of the type of parsed content, likePRODUCT
-
{META}
: a string representation of the scan metadata, like{POSSIBLE_COUNTRY=US/CA}
The following URL also works, and some have found it works where the HTTP URL above doesn't. This also shows usage of SCAN_FORMATS
:
zxing://scan/?ret=http%3A%2F%2Ffoo.com%2Fproducts%2F%7BCODE%7D%2Fdescription&SCAN_FORMATS=UPC_A,EAN_13
Separately, users can specify a custom search URL to invoke when a barcode is scanned with the Android app Barcode Scanner. When set under Settings, a Custom Search button will appear. The search URL can contain two placeholders: %
s for the barcode content, %t
the type, and %f
for the format. For example, http://example.org/?q=%s&format=%f&type=%t
might invoke, on a scan, a URL like http://example.org/?q=10359050900&format=EAN_13&type=PRODUCT