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httphttp-headersw3cetag
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Reputation: 2342

ETag format w3c

We use ETag header for syncronization on server and it corresponds to entities 'int version' field in DB. According to w3c docs: http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html Examples:

  ETag: "xyzzy"
  ETag: W/"xyzzy"
  ETag: ""

It means that ETag inside double quotes. So if I want to send it to client it should be done like:

int version = 2;
response.setHeader(HttpHeaders.ETAG, String.format("\"%s\"", version));

Or:

 int version = 2;
 response.setHeader(HttpHeaders.ETAG, String.format("%s", version));

In first case I get:

HTTP/1.1 200 OK
...
ETag: 2

In second:

HTTP/1.1 200 OK
...
ETag: "2"

Which way is more w3c compliant?

Upvotes: 2

Views: 2461

Answers (1)

Julian Reschke
Julian Reschke

Reputation: 42025

a) the W3C doesn't matter. You are looking at a copy of the IETF RFC 2616, hosted by the W3C. And that RFC is obsoleted, you should read RFC 7232 (for instance http://greenbytes.de/tech/webdav/rfc7232.html#header.etag).

b) Of your examples, the first one is incorrect, and the second one is correct.

Upvotes: 3

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