Use HTTP preload with EventSource/Server Sent Events?
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I have a page that immediately starts streaming events upon load, via an EventSource. To speed up the start of that stream, I'd like to use HTTP preload meta tags. But when I add this to my page:
<link rel="preload" as="fetch" crossorigin="crossorigin" href="http://myeventsource" />
Chrome warns me:
A preload for 'http://myeventsource' is found, but is not used because the request headers do not match.
Which is true: the preload has an Accept header of */*, while the EventSource-originated request has an Accept header of text/event-stream. The reading I've been doing suggests that the content of that header is controlled by the as parameter in the meta tag, but as far as I can see there is no eventstream-specific value.
Is there any way for me to override the Accept header it's sending?
javascript http http-headers eventsource
asked Nov 8 at 18:43
Alastair
3,13052246
add a comment |
up vote
3
down vote
favorite
I have a page that immediately starts streaming events upon load, via an EventSource. To speed up the start of that stream, I'd like to use HTTP preload meta tags. But when I add this to my page:
<link rel="preload" as="fetch" crossorigin="crossorigin" href="http://myeventsource" />
Chrome warns me:
A preload for 'http://myeventsource' is found, but is not used because the request headers do not match.
Which is true: the preload has an Accept header of */*, while the EventSource-originated request has an Accept header of text/event-stream. The reading I've been doing suggests that the content of that header is controlled by the as parameter in the meta tag, but as far as I can see there is no eventstream-specific value.
Is there any way for me to override the Accept header it's sending?
javascript http http-headers eventsource
asked Nov 8 at 18:43
Alastair
3,13052246
did you make any progress on this?
– skzryzg
2 days ago
No, as best I can tell it isn't possible right now. An alternative is HTTP2 push, I haven't investigated it too much but it might be worth a look.
– Alastair
2 days ago
add a comment |
up vote
3
down vote
favorite
up vote
3
down vote
favorite
I have a page that immediately starts streaming events upon load, via an EventSource. To speed up the start of that stream, I'd like to use HTTP preload meta tags. But when I add this to my page:
<link rel="preload" as="fetch" crossorigin="crossorigin" href="http://myeventsource" />
Chrome warns me:
A preload for 'http://myeventsource' is found, but is not used because the request headers do not match.
Which is true: the preload has an Accept header of */*, while the EventSource-originated request has an Accept header of text/event-stream. The reading I've been doing suggests that the content of that header is controlled by the as parameter in the meta tag, but as far as I can see there is no eventstream-specific value.
Is there any way for me to override the Accept header it's sending?
javascript http http-headers eventsource
asked Nov 8 at 18:43
Alastair
3,13052246
I have a page that immediately starts streaming events upon load, via an EventSource. To speed up the start of that stream, I'd like to use HTTP preload meta tags. But when I add this to my page:
<link rel="preload" as="fetch" crossorigin="crossorigin" href="http://myeventsource" />
Chrome warns me:
A preload for 'http://myeventsource' is found, but is not used because the request headers do not match.
Which is true: the preload has an Accept header of */*, while the EventSource-originated request has an Accept header of text/event-stream. The reading I've been doing suggests that the content of that header is controlled by the as parameter in the meta tag, but as far as I can see there is no eventstream-specific value.
Is there any way for me to override the Accept header it's sending?
javascript http http-headers eventsource
javascript http http-headers eventsource
asked Nov 8 at 18:43
Alastair
3,13052246
asked Nov 8 at 18:43
Alastair
3,13052246
asked Nov 8 at 18:43
Alastair
3,13052246
asked Nov 8 at 18:43
Alastair
3,13052246
asked Nov 8 at 18:43
Alastair
3,13052246
3,13052246
did you make any progress on this?
– skzryzg
2 days ago
No, as best I can tell it isn't possible right now. An alternative is HTTP2 push, I haven't investigated it too much but it might be worth a look.
– Alastair
2 days ago
add a comment |
did you make any progress on this?
– skzryzg
2 days ago
No, as best I can tell it isn't possible right now. An alternative is HTTP2 push, I haven't investigated it too much but it might be worth a look.
– Alastair
2 days ago
did you make any progress on this?
– skzryzg
2 days ago
did you make any progress on this?
– skzryzg
2 days ago
No, as best I can tell it isn't possible right now. An alternative is HTTP2 push, I haven't investigated it too much but it might be worth a look.
– Alastair
2 days ago
No, as best I can tell it isn't possible right now. An alternative is HTTP2 push, I haven't investigated it too much but it might be worth a look.
– Alastair
2 days ago
add a comment |
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did you make any progress on this?
– skzryzg
2 days ago
No, as best I can tell it isn't possible right now. An alternative is HTTP2 push, I haven't investigated it too much but it might be worth a look.
– Alastair
2 days ago