Began API work.

amazon-s3.scm

@@ -1,7 +1,34 @@
-(use base64 sha1 srfi-1 http-client uri-common intarweb json)
-(load "../hmac/hmac.scm")
+; author: Thomas Hintz
+; email: t@thintz.com
+; license: bsd
 
-(define secret-access-key (make-parameter ""))
+(module amazon-s3
+  (;; params
+   access-key secret-key https
+
+              *last-sig*
+
+   list-objects)
+              
+   ;; procs
+   ;bucket-exists? create-bucket delete-bucket list-buckets list-objects
+   ;get-object put-object delete-object)
+
+(import scheme chicken srfi-1 extras srfi-13 data-structures ports posix)
+(use base64 sha1 http-client uri-common intarweb srfi-19 hmac ssax)
+
+; needed to make intarweb work with Amazon's screwy authorization header
+(header-unparsers
+ (alist-update! 'authorization
+                (lambda (v) (list (vector-ref (first v) 0)))
+                (header-unparsers)))
+
+(define (intarweb-date date) (string->time (date->string date "~a ~b ~d ~T ~Y GMT")))
+(define (sig-date date) (date->string date "~a, ~d ~b ~Y ~T GMT"))
+
+(define access-key (make-parameter ""))
+(define secret-key (make-parameter ""))
+(define https (make-parameter #f))
 
 (define (make-aws-authorization verb resource #!key (date #f) (amz-headers '()) (content-md5 #f) (content-type #f))
   (let* ((can-amz-headers (sort (map (lambda (header)
@@ -24,21 +51,62 @@
                                       ""
                                       can-amz-headers))
                          (display resource))))
-         (hmac-sha1 (base64-encode ((sha1-hmac (secret-access-key)) can-string))))
+         (hmac-sha1 (base64-encode ((hmac (secret-key) (sha1-primitive)) can-string))))
+    (set! *last-sig* can-string)
     (values hmac-sha1 can-string)))
 
+(define *last-sig* #f)
+
+(define (list-objects bucket)
+;  (handle-exceptions
+;   exn
+;   ((condition-property-accessor 'client-error 'body) exn)
+  (with-input-from-request
+   (make-request
+    method: 'GET
+    uri: (uri-reference (string-append "http" (if (https) "s" "") "://" bucket ".s3.amazonaws.com"))
+    headers: (let ((n (current-date 0)))
+               (headers `((date #(,(intarweb-date n) ()))
+                          (authorization ,(string-append "AWS " (access-key) ":"
+                                                         (make-aws-authorization
+                                                          "GET" (string-append "/" bucket "/")
+                                                          date: (sig-date n)
+                                                          content-type: "application/x-www-form-urlencoded")))))))
+    '()
+    (lambda () (ssax:xml->sxml (current-input-port) '()))))
+   
+
+
+
+
+;(define *the-date* #f)
+;(define *date-as-date* (current-date -4))
+;(define (update-date)
+;  (set! *date-as-date* (current-date -4))
+;  (set! *the-date* (date->string *date-as-date* "~a, ~d ~b ~Y ~T GMT")))
+;(define (sig) (make-aws-authorization "GET" "/test-bucket-keep-the-records" date: *the-date* content-type: "application/x-www-form-urlencoded"))
+
+;(define (get-test)
+;  (update-date)
+;  (handle-exceptions
+;   exn
+;   ((condition-property-accessor 'client-error 'body) exn)
+;   (with-input-from-request
+;    (make-request method: 'GET
+;                  uri: (uri-reference "http://s3.amazonaws.com/test-bucket-keep-the-records")
+;                  headers: (headers `((date #(,(string->time (date->string *date-as-date* "~a ~b ~d ~T ~Y GMT")) ()))
+;                                      (authorization ,(string-append "" (sig))))))
+;    '()
+;    read-string)))
+)
 
-(secret-access-key "")
-(define sig (make-aws-authorization "GET" "/test-bucket-keep-the-records/test-ktr" date: "1297806701"))
-
-(define (get-test)
-  (handle-exceptions
-   exn
-   ((condition-property-accessor 'client-error 'body) exn)
-   (with-input-from-request
-    (make-request method: 'GET
-                  uri: (uri-reference "http://s3.amazonaws.com/test-bucket-keep-the-records/test-ktr"))
-    `((AWSAccessKeyId . "AKIAJ4BAYHGF254QF7DQ")
-      (Expires . "1297806701")
-      (Signature . ,sig))
-    json-read)))
+;(update-date)
+;(define r (make-request uri: (uri-reference "")
+;                        port: (current-output-port)
+;                        headers: (headers `((date #(,(string->time (date->string *date-as-date* "~a ~b ~d ~T ~Y ~z")) ()))
+;                                            (authorization ,(string-append "" (sig)))))))
+;(header-unparsers
+; (alist-update! 'authorization
+;                (lambda (v) (list (vector-ref (first v) 0)))
+;                (header-unparsers)))
+;(write-request r)