PROTOCOL: JS API FETCH STREAM for flv.js

[winlinvip]

Reference: #691 (comment)
It seems that there is a new JS API that supports streaming reading with GET. However, it is unclear whether SRS needs to provide support for this or if standard HTTP GET is sufficient. Therefore, creating this bug to track it.

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[xqq]

It is a standard HTTP GET, both chunked or non-chunked are acceptable.

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[xqq]

Just need to add the header 'Access-Control-Allow-Origin' to the output, you can try playing with flv.js.

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[ChandZhang]

Tested on version 3.0.18, it also needs to be added in the Header. The output of the Chrome test is as follows:
Fetch API cannot load http://192.168.1.242:8080/app/test.flv. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://192.168.1.241' is therefore not allowed access. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled.

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[hman190]

Hello, I tried using flv.js to play http flv, but I still encountered the error message "Fetch API cannot load http://.../live/livestream.flv. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://...' is therefore not allowed access. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled." How can I resolve this issue? Thank you.

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[ChandZhang]

You can temporarily use a proxy. Refer to #722 @hman190

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[winlinvip]

Just enable crossdomain, refer to the configuration.

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[ChandZhang]

I enabled crossdomain but it didn't work. I'll try again later.

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[winlinvip]

Make sure to open it in http_server, and if there are any issues, please provide feedback.

http_server {
    crossdomain     on;
}

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[ChandZhang]

Now it's good.
Just saw that there is a fix later.

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[winlinvip]

Great~

[janyo1201]

hi winlinvip
I am testing the version of SRS 2.0.243.
http_server {
crossdomain on;
}

Will there be support for version SRS2.0.243 when there is an error at startup?
[2017-06-03 14:22:58.662][error][1955][0][0] unsupported http_stream directive crossdomain, ret=1023

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[winlinvip]

SRS3 can support it, but it has not been released.

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[LF-DevJourney]

I compiled using the latest source code, but still have this issue.

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[LF-DevJourney]

When using flv.js to play FLV, there is a cross-origin issue. To solve this, add w->header()->set("Access-Control-Allow-Origin", "*"); after srs_app_http_stream.cpp#485 to set Access-Control-Allow-Origin. For security reasons, * can be replaced with a specific value.

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[winlinvip]

I will supplement the issue of cross-domain once again:

1. Use HTTP proxy to solve cross-domain, such as https://github.com/ossrs/go-oryx/tree/develop/httpx-static
2. It has been solved in SRS3, but this modification is quite significant and has not been merged into SRS2. If you want to add it in SRS2, you can refer to the method mentioned above, although it is not the best solution (because it adds this header even in non-cross-domain situations), but it can work without any problem.

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[winlinvip]

Dup to #717 #798 #1002 #1025