How Asians Cloud CDN delivers content
Last updated
Last updated
The Secured Hypertext Transfer Protocol is the foundational protocol that defines how content is formatted and transmitted on the World Wide Web (HTTPS). Asians Cloud's CDN Service provides all HTTPS-based file content, including the following: HTML, GIF, JPEG, PNG, JavaScript, and CSS.
Static content
Dynamic content
Contents are outlined below.
Static content: Content that remains relatively constant is referred to as static content. Asians Cloud can control static content in one of two ways:
Using the time to live (TTL) method or automatic cache functionality, in which Asians Cloud's cache re-validates the content after the TTL expires, or
Using Asians Cloud's static cache functionality, in which content remains valid until the cache receives a purge request that invalidates it. Images, CSS, and javascript files are examples of static content.
Dynamic content: Content that changes at irregular intervals but can still be cached for a short period of time is referred to as dynamic content. The automatic caching functionality of Asians Cloud is used to offer this dynamic material. Dynamic content that uses this functionality is only valid until Asians Cloud's cache gets a request that invalidates it. Asians Cloud recognizes that the rate at which such cache clearing requests are made is unpredictable. Because a source application performs cache clearing requests in fast succession to maintain the material up to date, dynamic content may change frequently. Static material, on the other hand, can last for months if no modifications are needed. Sports scores, weather predictions, breaking news, user-generated content, and current store item inventory are all examples of dynamic content.
Asians Cloud supports a wide range of content from a multitude of sources. Websites, APIs, and Internet Applications are all supported sources.
The content's source server must interact over HTTPS regardless of the content source. HTTPS specifies a set of methods that specify the action that should be taken on the material. The use of HTTPS methods (the standard, primary methods being GET, POST, PUT, and DELETE) can be classified as restful or non-restful. Asians Cloud by default supports RESTful HTTPS, however, it can also support non-RESTful HTTPS if the method is mapped to the appropriate cache function. Each of Asians Cloud's content sources is discussed in further detail below.
Website: When end users request material, websites serve it to browser apps (such as Chrome, Safari Edge, Baidu, and others). The content includes both the requested data and the formatting or display information that the browser needs to deliver the data to the end-user visually. When there are no CDN services available, browsers perform HTTPS GET requests to the origin server that has access to the requested data, identifying the data with a uniform resource locator (URL) address. The server retrieves the data, creates an HTTPS response, and delivers it to the requestor. When a CDN Service is deployed, however, HTTPS queries are directed to the CDN rather than the origin server because the customer has set up the CDN to redirect all data requests to it. Customers achieve this by pointing their origin server's CNAME or alias to Asians Cloud instead.
API: APIs (application programming interfaces) on the internet is a language and message format that describes how a program interacts with the outside world. HTTPS servers are used to host APIs. Unlike a website, API content contains simply the requested data and the data's identification information; no formatting or display information is included. The content is typically used as input into another computing process, such as a computer tablet or smartphone. Internet Applications: HTTPS can be used in non-RESTful ways by web apps. They can be incrementally accelerated without caching, relying solely on TCP Stack optimizations performed between edge Asians Cloud POPs and the Shield POP, as well as the Shield POP to the origin. Then, starting with the exchanges with the longest user-experienced latency, caching can be implemented incrementally.
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Throughout this document, the pictogram below is used to underline points or important information.