If you look at how to post image data via http communication, every article says Content-Type: multipart/form-data.(Or you can encode the image binary data in base64 and include it in json etc.)
In my perception, multipart/form-data is a perception that I specify when I send multiple types of data at once, but as far as I've looked, multipart/form-data is treated as if it's necessary to send images.
Is it actually necessary to specify multipart/form-data to send images?
If it is a single image, I wonder if it is possible to send binary data of the image using the content-type as image/png.
If you want to send a file as form data, not just an image, you must specify multipart/form-data because it also contains non-file data.All but files are text data, but files are binary data.
Submit Form Data - Learn Web Development | MDN
Since the data is divided into several parts and each file and string data is included in the form body, set the enctype value to multipart/form-data.
This does not apply to uploading files in the program.
Using Files from a Web Application - Web API | MDN
The upload MIME type is set by calling the XMLHttpRequest function overrideMimeType().In this case, you are using a typical MIME type.You may not need to configure the MIME type for some purposes.
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