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[ASP.NET] ASP.NET Core (thirty) HtpClient streams, outputs responses while downloading

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Posted on 2024-12-13 19:20:39 | | | |
Requirements: ASP.NET Core project, the download interface is to download data responses from other sites to users, similar to the function of a reverse proxy. Using HttpClient to download files and simultaneously respond to output (i.e., streaming) is a common need, especially when dealing with large files. This avoids loading entire files into memory, improving performance and resource utilization. At the same time, it will also shorten the browser response time and will not keep the browser spinning in circles.

HtpClient does not use streaming, downloads resources to content and then responds to users, as shown in the following image:



Users have to wait 26 seconds for the browser to receive a response and start downloading the file, which is a very bad user experience.

HtpClient uses streaming, and users only need to wait 1 second to start downloading content (the waiting time depends on the bandwidth of the website server or the target resource server), as shown in the figure below:



The code is as follows:

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