Browser Cache TTL
You can customize the cache time to live (TTL) of client browsers to reduce the pull rate. When a user requests a resource, if the resource is cached in their browser, the resource is directly returned. Otherwise, the browser will request the resource from a CDN PoP.
Precautions
- Add up to 10 rules for each domain name.
- Add only one rule for all files or homepage for each domain name.
Procedure
-
The CDN console is displayed.
- In the navigation pane, choose .
- In the domain list, click the target domain name or click Configure in the Operation column.
- Click the Cache Settings tab.
- In the Browser Cache TTL area, click Edit.
- In the displayed dialog box, click Add and set the browser cache policy as required.
Figure 1 Browser cache TTL
Table 1 Parameters Parameter
Description
Type
- All files
- File type: files with the specified extension names
- Directory: files under the specified directory
- Full path: file of the complete path
- Homepage
Content
When Type is set to All files, you do not need to set this parameter.
When Type is set to File type:- Start with a period (.) and separate file name extensions by commas (,). Do not end with a comma (,) or enter consecutive commas (,).
- Enter up to 20 file name extensions.
- Enter up to 255 characters.
- File name extensions are case-insensitive.
- Example: .JPG,.zip,.exe
When Type is set to Directory:
- Start with a slash (/) and separate directories by commas (,). Do not end with a comma (,) or enter consecutive commas (,).
- Enter up to 20 directories.
- Enter up to 255 characters.
- Do not enter wildcards (*).
- Example: /test/folder01,/test/folder02
When Type is set to Full path:
- Start with a slash (/).
- A wildcard (*) can only follow the last slash (/).
- Enter only one full path.
- Enter up to 255 characters. The following special characters are not allowed: ,;|:"\
- Examples: /test/index.html or /test/*.jpg
When Type is set to Homepage, the root directory of a website is used. It is the top-level directory of the website folder, which contains all subfolders of the website. For example, for www.example.com/abc/file01/2.png, abc/ is the root directory.
Priority
Priority of the rule. Enter an integer ranging from 1 to 100. A greater number indicates a higher priority.
- Each rule must have a unique priority.
Cache Mode
- Honor origin Cache-Control: Comply with the cache policy of the origin server, that is, the setting of the Cache-Control header.
- Cache: Comply with the TTL set in this rule.
- No cache: Browsers do not cache the resources.
TTL
When the configured TTL arrives and a user requests the resources again, the browser requests the resources from CDN.
- The value ranges from 0 to 365 days.
- Click OK.
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