Hi all,
I'm having trouble accessing the Google geocode API using http-sendrecv.
Code is:
(define (lookup address)
(let [
(form-data (alist->form-urlencoded
(list (cons 'address address)
)))
(response #f)
(lat #f)
(long #f)
]
(printf "Looking up ~s~n" address)
(printf "=> ~s~n" form-data)
(with-handlers [
(exn:fail?
(lambda (e)
(fprintf (ferr) "~n~n%%~n~a~n%%~n" (format
"Error: ~a" (exn-message e)))
))
]
(let-values [
((errcode header port)
(http-sendrecv "maps.googleapis.com"
"http://maps.googleapis.com/maps/api/geocode/json";
;#:ssl? ssl?
;#:port port
#:version #"1.1"
#:method #"GET"
#:headers (list "Content-Type:
application/x-www-form-urlencoded")
#:data form-data
;#:content-decode decodes
))
]
(set! response (port->string port))
;(set! response (read-json port))
(printf "=> ~s~n" response)
))
(fprintf (ferr) "lat:~s long:~s~n" lat long )
(values lat long)
))
It doesn't yet extract relevant data because I haven't yet successfully
gotten anydata. 8-(
As a test Ilookup the State House in Boston:
(lookup "24 Beacon St, Boston, MA, 01233")
Looking up "24 Beacon St, Boston, MA, 01233"
=> "address=24+Beacon+St%2C+Boston%2C+MA%2C+01233"
=> "<!DOCTYPE html>\n<html lang=en>\n <meta charset=utf-8>\n <meta
name=viewport content=\"initial-scale=1, minimum-scale=1,
width=device-width\">\n <title>Error 400 (Bad Request)!!1</title>\n
<style>\n *{margin:0;padding:0}html,code{font:15px/22px
arial,sans-serif}html{background:#fff;color:#222;padding:15px}body{margin:7%
auto 0;max-width:390px;min-height:180px;padding:30px 0 15px}* >
body{background:url(//www.google.com/images/errors/robot.png) 100% 5px
no-repeat;padding-right:205px}p{margin:11px 0
22px;overflow:hidden}ins{color:#777;text-decoration:none}a
img{border:0}@media screen and
(max-width:772px){body{background:none;margin-top:0;max-width:none;padding-right:0}}#logo{background:url(//www.google.com/images/errors/logo_sm_2.png)
no-repeat}@media only screen and
(min-resolution:192dpi){#logo{background:url(//www.google.com/images/errors/logo_sm_2_hr.png)
no-repeat 0% 0%/100%
100%;-moz-border-image:url(//www.google.com/images/errors/logo_sm_2_hr.png)
0}}@media only screen and
(-webkit-min-device-pixel-ratio:2){#logo{background:url(//www.google.com/images/errors/logo_sm_2_hr.png)
no-repeat;-webkit-background-size:100%
100%}}#logo{display:inline-block;height:55px;width:150px}\n </style>\n
<a href=//www.google.com/><span id=logo aria-label=Google></span></a>\n
<p><b>400.</b> <ins>That’s an error.</ins>\n <p>Your client has issued
a malformed or illegal request. <ins>That’s all we know.</ins>\n"
lat:#f long:#f
#f
#f
Totally unhelpful.
However if I paste the URI and urlencoded data into a browser:
http://maps.googleapis.com/maps/api/geocode/json?address=24+Beacon+St%2C+Boston%2C+MA%2C+01233
then I get a good return. It also works from an HTML form, e.g.,
<form action="http://maps.googleapis.com/maps/api/geocode/json";
method="GET">
<label>address</label>
<input type="text" name="address" size="128" />
<button type="submit" >
GEOCODE
</button>
</form> <!-- login -->
I'm using http-sendrecv successfully with other web APIs - I just can't
figure out what I'm doing wrong with Google. Number and/or frequency of
requests is not an issue - I'm very far from the daily limit and many
minutes elapse between tests as I'm trying to figure out what's wrong.
The documentation is at
https://developers.google.com/maps/documentation/geocoding/#GeocodingRequests
Any clues to pierce the veil of stupidity would be appreciated.
Thanks,
George
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