March 2018
Beginner to intermediate
410 pages
10h 40m
English
Content preview from Mastering Internet of Things
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Optimizing requests
Other headers can be used to optimize HTTP performance. HTTP supports conditional requests. Conditional requests are typically used together with some form of cache or previous knowledge of a resource. You can use the If- headers to perform actions, such as getting a resource if it is newer (Last-Modified) or different (ETag) from the resource you already have. You can upload new content only if you have a newer (Last-Modified) or different (ETag) version:
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Header |
Description |
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Expect |
Can be used to break a Request/Response into two requests/responses. First, only the header of the request is sent, and secondly, only the content, and only if the server is ready to accept it. While this might be counter-intuitive ... |
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