"Image" component with "NSURLErrorDomain Code=403"

[yanni4night]

This is the same issue as SDWebImage/SDWebImage#1228.

By default, RN fetch images with a weird user-agent string, which may lead to 403 response from server.

There is an implicit headers attribute for source of Image component:

<Image source={{uri: 'https://...', headers: {'User-Agent': '...'}}}/>

Set User-Agent to avoid this error.

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iOS may need https protocol always.

BTW, DO NOT insert any newline into UA string