http://quickblox.com/developers/Content#Upload_a_file
when i post my form(encode=multipart/form-data action=params field from the response of file creation.. something like " http://qbprod.s3.amazonaws.com/?AWSAccessKeyId=AKIAIY7KFM23XGXJ7R7A&Policy=eyAiZXhwaXJhdGlvbiI6ICIyMDEyLTA0LTIzVDE0OjIyOjM0WiIsCiAgICAgICJjb25kaXRpb25zIjogWwogICAgICAgIHsiYnVja2V0IjogInFicHJvZCJ9LAogICAgICAgIFsiZXEiLCAiJGtleSIsICIzMGE4YmNkN2M3MTQ0MTdlYjYyYjk1MzUwZDdlMTNiOTAwIl0sCiAgICAgICAgeyJhY2wiOiAiYXV0aGVudGljYXRlZC1yZWFkIn0sCiAgICAgICAgWyJlcSIsICIkQ29udGVudC1UeXBlIiwgImltYWdlL2pwZWciXSwKICAgICAgICB7InN1Y2Nlc3NfYWN0aW9uX3N0YXR1cyI6ICIyMDEifQogICAgICBdCiAgICB9&Signature=eBtgK1jAzsGNcFjpqEGiTLnm008%3D&key =30a8bcd7c714417eb62b95350d7e13b900&Content-Type=image%2Fjpeg&acl=authenticated-read&success_action_status=201 " + 过期字段。
响应是:...我们计算的请求签名与您提供的签名不匹配。检查您的密钥和签名方法。...
我做错了什么?谁能帮我上传?