GCS Generate_Signed_Url在加载后过期 [英] GCS Generate_Signed_Url expires upon loading

问题描述

我正在实现一些代码来为json文件中指定的某些图像生成一个签名的url，这是用于生成它们的方法

I am implementing some code to generate a signed url for some images that are specified in a json file, this is the method used to generate them

def geturl(image_name):
    storage_client = storage.Client()
    bucket = 'Bucket Name'
    source_bucket = storage_client.get_bucket(bucket)
    blobs = source_bucket.list_blobs()
    for blob in blobs:
        if image_name == blob.name:
            url_lifetime = 3600
            serving_url = blob.generate_signed_url(url_lifetime)
            return serving_url
    return 

此后，它们被用于img scr<>，但是在加载页面时，图像不加载，并且在url之后，我收到错误消息

after this they are used in an img scr <>, however when loading the page the images do not load and following the url i receive the error

提供的令牌已过期请求签名已过期:1970-01-01T10:00:00 + 00:00

The provided token has expired Request signature expired at: 1970-01-01T10:00:00+00:00

即使更改生命周期，错误消息仍然存在

even when changing the lifetime the error message persists

推荐答案

您的参数 url_lifetime 未正确初始化.正确的含义是到期日期，它是从格林尼治标准时间1970年1月1日开始的秒数.您的有效期限是从1970年开始的一个小时.

Your parameter url_lifetime is not initialized correctly. The correct meaning is expiration date which is a value in seconds from January 1, 1970 GMT. Your expiration was one hour into 1970.

正确的方法是当前时间+ 3600 秒.

有许多获取当前时间的方法.示例: int(time.time())返回以您的时区为单位的当前时间(以秒为单位).通常，您将需要将当前时间转换为格林尼治标准时间，然后获取秒数.

There are many ways to get the current time. Example: int(time.time()) which returns the current time in your timezone in seconds. Typically you will want to convert the current time to GMT and then grab the seconds.

注意:在这个答案中，我使用的格林尼治标准时间与UTC用法相同.

Note: In this answer, I am using GMT in the same usage as UTC.

from datetime import timezone, datetime
int(datetime.now(tz=timezone.utc).timestamp()

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