COS uses the imageInfo API provided by CI to query an image’s basic information such as its format, width, and height.
Note:Image Processing is charged by CI. For detailed pricing, please see Basic image processing fee in Billing and Pricing.
download_url?imageInfo
Operation: imageInfo
Parameter | Description |
---|---|
download_url | URL of the input image, formatted as <BucketName-APPID>.cos.<Region>.myqcloud.com/<picture name> Example: examplebucket-1250000000.cos.ap-shanghai.myqcloud.com/picture.jpeg |
Parameter | Description |
---|---|
format | Image format such as png or gif |
width | Width of the image, in pixels |
height | Height of the image, in pixels |
size | Image size, in bytes |
md5 | MD5 checksum of the image |
frame_count | Number of frames. For static images, this value is 1 . |
http://examples-1251000004.cos.ap-shanghai.myqcloud.com/sample.jpeg?imageInfo
{"format": "jpeg", "width": "960", "height": "540", "size": "158421", "md5": "77a16fa70e2eba652fb42e8a639c52f2"}
This example obtains the average hue in the same way as in the example above except that a signature is carried. The signature is joined with other parameters using an ampersand (&):
http://examples-1251000004.cos.ap-shanghai.myqcloud.com/sample.jpeg?q-sign-algorithm=<signature>&imageInfo
Note:You can obtain the value of
<signature>
by referring to Request Signature.
To prevent unauthorized users from accessing or downloading the input image by using a URL that does not contain any processing parameter, you can add the processing parameters to the request signature, making the processing parameters the key of the parameter with the value left empty. The following is a simple example for your reference (it might have expired or become inaccessible). For more information, please see Request Signature.
http://examples-1251000004.cos.ap-shanghai.myqcloud.com/sample.jpeg?q-sign-algorithm=sha1&q-ak=AKID********************&q-sign-time=1593342360;1593342720&q-key-time=1593342360;1593342720&q-header-list=&q-url-param-list=watermark%252f1%252fimage%252fahr0cdovl2v4yw1wbgvzlteyntewmdawmdqucgljc2gubxlxy2xvdwquy29tl3nodwl5aw4uanbn%252fgravity%252fsoutheast&q-signature=26a429871963375c88081ef60247c5746e834a98&watermark/1/image/aHR0cDovL2V4YW1wbGVzLTEyNTEwMDAwMDQucGljc2gubXlxY2xvdWQuY29tL3NodWl5aW4uanBn/gravity/southeast
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