Tencent Cloud CDN allows you to configure fine-grained origin-pull based on origin-pull rules, such as path-based rules (i.e., specifying a file type, folder, full file path, or homepage for origin-pull) and client IP region-based rules.
Restrictions
By default, the origin-pull protocol and origin domain of the primary origin server are adopted for the advanced origin-pull configuration and cannot be modified.
2. Click Domain Management on the left sidebar to enter the domain name management list.
3. Select the target domain name and click Manage to enter the domain name configuration page.
4. On the Baisc information tab, find the Origin server section and click Edit in the top-right corner of the Primary origin section.
5. Click Advanced origin-pull configuration.
6. Set the configuration items in the Advanced origin-pull configuration section as described in the following table.
Item
Description
Origin-pull Rule
Client requests can be forwarded by the following rules:
Client IP: This rule directs origin-pull requests of clients inside or outside the specified region to the specified origin address.
File extension: This rule directs origin-pull requests for the specified file extensions to the specified origin address. If you specify multiple file extensions, separate them with semicolons (;).
File directory: This rule directs origin-pull requests for files in the specified directory to the specified origin address. If you specify multiple directories, separate them with semicolons (;).
Full path: This rule directs origin-pull requests for a specific file with its full path, such as /a/1.jpg, to the specified origin address. If you specify multiple files with their full paths, separate the files with semicolons (;).
Homepage: This rule directs origin-pull requests for files on the homepage to the specified origin address.
Origin-pull Address
You can specify domain names or IP addresses. One origin-pull address is required for an origin-pull rule. In addition, the value of the origin domain specified for the primary domain name in the Origin server section is used.
Port
You can specify a custom origin-pull port number. If you do not specify custom port numbers, port 80 is used for origin-pull over HTTP and port 443 is used for origin-pull over HTTPS. The origin-pull protocol depends on settings of the origin server. If you select HTTPS for Origin-pull Protocol in the Origin server section, the requests hit by an advanced origin-pull rule are forwarded over HTTPS.
Configuration limitations
Each domain name can be configured with up to 50 rules.
The origin-pull address of a single rule can be an IP, domain name, and port (range: 0 - 65535; port can be omitted). If "HTTPS" or "Follow Protocol" is selected as the origin-pull protocol, the port should be 443 or left empty.
More actions: you can adjust rule priority and edit or delete multiple rules in batches.
Rule priorities
First, the priority of a client IP rule is lower than that of a path-based rule. Second, if multiple path-based rules are specified, rules at lower positions in the rule list have higher priorities.
For example, you have specified that origin-pull requests of clients from the Jiangsu region are forwarded to 1.1.1.1 and origin-pull requests for files whose path contains /test are forwarded to 2.2.2.2. When a client from the Jiangsu region accesses /test, the origin-pull request is forwarded to 2.2.2.2.
Sample configuration
Example:
This example describes three origin-pull scenarios, assuming that you have configured www.example.com as the CDN acceleration domain name, with the advanced origin-pull rules configured as shown in the following figure:
Scenario 1: A client from the Shanghai region accesses http://www.example.com/vod/. In this case, the origin-pull request hits the File directory rule and is forwarded to 1.1.1.3.
Scenario 2: A client from the Guangdong region accesses http://www.example.com/. In this case, the origin-pull request hits both the Homepage rule and the Client IP rule. As the Homepage rule has a higher priority, the origin-pull request is forwarded to 1.1.1.5.
Scenario 3: A client from the Guangdong region accesses http://www.example.com/image/1.jpg. In this case, the origin-pull request hits the File extension, Full path, and Client IP rules at the same time. As a path-based rule has a higher priority over an IP-based rule, and the Full path rule is listed lower than the File extension rule, the origin-pull request is forwarded to 1.1.1.4.
