[gRPC #12.1] Upload file in chunks with client-streaming gRPC - Golang

[@babanadopu]

Excellent content! I would just like to see how you could save the file chunks directly to disk by appending chunk by chunk to the open file, as they are read from the stream. With your current implementation, you buffer the whole image in RAM and then store it to file all at once. By saving chunk by chunk, we could send over pretty large files and not worry if the machine will run out of RAM

[@TECHSCHOOLGURU]

Yes, you're absolutely right, Aleksandar! I also thought about that when making this video. However, to keep this video simple and focus on the main point about client-streaming gRPC, I decided to just buffer the whole image in memory.

[@khoaminh5569]

Hi, thank you very much for your awesome video, can you give me example how to write file chunk by chunk ?

[@until_4ever362]

This is the best instructional video I have ever seen

[@TECHSCHOOLGURU]

Thanks! That means a lot to me.

[@until_4ever362]

Thank you very much, I like your video very much

[@TECHSCHOOLGURU]

I'm glad you like it, Pd Yolo :D

[@anhhaoam3379]

[@yusupovjasur]

I wonder why I'm not getting an error saying "laptopServer should implement UploadImage method" after I have generated new protobuf files

[@yisanhuang9298]

When I click "run test" on TestClientUploadImage function. I met an error "The process cannot access the file be cause it is being used by another process." At this time, the jpg file in tmp dir was processed by the client and server, the client has called the file.close(), the server receives the data and save them to file, but not call file.close(). I found at line 57 in service/image_store.go file, should add "defer file.Close()" . This issue may not happen on MAC OS, but I am using windows.

[@TECHSCHOOLGURU]

nice catch! thanks Yisan!

[@nossandra]

Thank you very much!

[@TECHSCHOOLGURU]

Welcome!

[@whorudra]

Topics and tutorial is awesome. I am having trouble on understanding things a bit maybe its because of you are explaining super fast. It feels like I am following your code but not understanding it. So please give some time on explaining and slow down a bit. also the whole test thing in client/main.go is really confusing. stores are also confusing.

[@TECHSCHOOLGURU]

Thanks for your feedback, Rudra! I will try to slower down a bit and explain more in the next videos. However, I suggest you to watch the whole course (bit.ly/grpccourse) from the beginning to fully understand it, because the codes in each lecture is written based on the previous ones.

[@whorudra]

@@TECHSCHOOLGURU I am following your whole playlist.😊

[@Ali_Alhajji]

@@TECHSCHOOLGURU The lessons and code are great, but when you do the videos you're only reading what you're writing, and you do it very fast. There is no explaining of why you're doing what you're doing.

[@vjekoeng5]

Allow me to share some insights. In my case, 12 lectures later, I am starting to get a grasp of things. I have experience in C/C++/Python, but left coding in favor of product management. With fair experience in coding, not working with Go previously doesn't seem to be an issue. What is quite challenging is to understand the details of client-service implementation i.e. how does the whole "architecture" work. Additionally, I don't think that introductory lessons on gRPC shared enough to understand details of implementation in client/service. Once you start connecting the dots on those, everything makes sense. In that light, I definitely agree that explaining why are things done the way they are would significantly raise quality of the lessons.

[@atulbari4867]

Thanks man !!!

[@TECHSCHOOLGURU]

Happy to help

[@ArjunTiwari91]

What does this "one of " do in .proto ?

[@ShubhamGupta-vi2bm]

Yeah! I am confused with same when to use the enums and oneof

[@yisanhuang9298]

Thanks, my teacher! I have a question. When the client uploads an image, it uses many times to call stream.Send function, the one is sending image's info, the others are sending image data, at the server-side, the server can get info or data from the same stream, can this be understood as using the features of http2？Thanks again!

[@TECHSCHOOLGURU]

Yes, exactly Yisan. The same stream can be used to send and receive multiple chunks of the data.

[@Hjgd-d5o]

Too much code for a simple task