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wireprotov2: server support for sending content redirects...
wireprotov2: server support for sending content redirects A "content redirect" can be sent in place of inline response content. In terms of code, we model a content redirect as a special type of response object holding the attributes describing that redirect. Sending a content redirect thus becomes as simple as the object emission layer sending an instance of that type. A cacher using externally-addressable content storage could replace the outgoing object stream with an object advertising its location. The bulk of the code in this commit is teaching the output layer which handles the object stream to recognize alternate location objects. The rules are that if an alternate location object is present, it must be the first and only object in the object stream. Otherwise the server emits an error. Differential Revision: https://phab.mercurial-scm.org/D4777
Gregory Szorc - - Load All Authors

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test-http-api-httpv2.t
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#require no-chg
$ . $TESTDIR/wireprotohelpers.sh
$ enabledummycommands
$ hg init server
$ cat > server/.hg/hgrc << EOF
> [experimental]
> web.apiserver = true
> EOF
$ hg -R server serve -p $HGPORT -d --pid-file hg.pid
$ cat hg.pid > $DAEMON_PIDS
HTTP v2 protocol not enabled by default
$ sendhttpraw << EOF
> httprequest GET api/$HTTPV2
> user-agent: test
> EOF
using raw connection to peer
s> GET /api/exp-http-v2-0002 HTTP/1.1\r\n
s> Accept-Encoding: identity\r\n
s> user-agent: test\r\n
s> host: $LOCALIP:$HGPORT\r\n (glob)
s> \r\n
s> makefile('rb', None)
s> HTTP/1.1 404 Not Found\r\n
s> Server: testing stub value\r\n
s> Date: $HTTP_DATE$\r\n
s> Content-Type: text/plain\r\n
s> Content-Length: 33\r\n
s> \r\n
s> API exp-http-v2-0002 not enabled\n
Restart server with support for HTTP v2 API
$ killdaemons.py
$ enablehttpv2 server
$ hg -R server serve -p $HGPORT -d --pid-file hg.pid
$ cat hg.pid > $DAEMON_PIDS
Request to unknown command yields 404
$ sendhttpraw << EOF
> httprequest POST api/$HTTPV2/ro/badcommand
> user-agent: test
> EOF
using raw connection to peer
s> POST /api/exp-http-v2-0002/ro/badcommand HTTP/1.1\r\n
s> Accept-Encoding: identity\r\n
s> user-agent: test\r\n
s> host: $LOCALIP:$HGPORT\r\n (glob)
s> \r\n
s> makefile('rb', None)
s> HTTP/1.1 404 Not Found\r\n
s> Server: testing stub value\r\n
s> Date: $HTTP_DATE$\r\n
s> Content-Type: text/plain\r\n
s> Content-Length: 42\r\n
s> \r\n
s> unknown wire protocol command: badcommand\n
GET to read-only command yields a 405
$ sendhttpraw << EOF
> httprequest GET api/$HTTPV2/ro/customreadonly
> user-agent: test
> EOF
using raw connection to peer
s> GET /api/exp-http-v2-0002/ro/customreadonly HTTP/1.1\r\n
s> Accept-Encoding: identity\r\n
s> user-agent: test\r\n
s> host: $LOCALIP:$HGPORT\r\n (glob)
s> \r\n
s> makefile('rb', None)
s> HTTP/1.1 405 Method Not Allowed\r\n
s> Server: testing stub value\r\n
s> Date: $HTTP_DATE$\r\n
s> Allow: POST\r\n
s> Content-Length: 30\r\n
s> \r\n
s> commands require POST requests
Missing Accept header results in 406
$ sendhttpraw << EOF
> httprequest POST api/$HTTPV2/ro/customreadonly
> user-agent: test
> EOF
using raw connection to peer
s> POST /api/exp-http-v2-0002/ro/customreadonly HTTP/1.1\r\n
s> Accept-Encoding: identity\r\n
s> user-agent: test\r\n
s> host: $LOCALIP:$HGPORT\r\n (glob)
s> \r\n
s> makefile('rb', None)
s> HTTP/1.1 406 Not Acceptable\r\n
s> Server: testing stub value\r\n
s> Date: $HTTP_DATE$\r\n
s> Content-Type: text/plain\r\n
s> Content-Length: 85\r\n
s> \r\n
s> client MUST specify Accept header with value: application/mercurial-exp-framing-0005\n
Bad Accept header results in 406
$ sendhttpraw << EOF
> httprequest POST api/$HTTPV2/ro/customreadonly
> accept: invalid
> user-agent: test
> EOF
using raw connection to peer
s> POST /api/exp-http-v2-0002/ro/customreadonly HTTP/1.1\r\n
s> Accept-Encoding: identity\r\n
s> accept: invalid\r\n
s> user-agent: test\r\n
s> host: $LOCALIP:$HGPORT\r\n (glob)
s> \r\n
s> makefile('rb', None)
s> HTTP/1.1 406 Not Acceptable\r\n
s> Server: testing stub value\r\n
s> Date: $HTTP_DATE$\r\n
s> Content-Type: text/plain\r\n
s> Content-Length: 85\r\n
s> \r\n
s> client MUST specify Accept header with value: application/mercurial-exp-framing-0005\n
Bad Content-Type header results in 415
$ sendhttpraw << EOF
> httprequest POST api/$HTTPV2/ro/customreadonly
> accept: $MEDIATYPE
> user-agent: test
> content-type: badmedia
> EOF
using raw connection to peer
s> POST /api/exp-http-v2-0002/ro/customreadonly HTTP/1.1\r\n
s> Accept-Encoding: identity\r\n
s> accept: application/mercurial-exp-framing-0005\r\n
s> content-type: badmedia\r\n
s> user-agent: test\r\n
s> host: $LOCALIP:$HGPORT\r\n (glob)
s> \r\n
s> makefile('rb', None)
s> HTTP/1.1 415 Unsupported Media Type\r\n
s> Server: testing stub value\r\n
s> Date: $HTTP_DATE$\r\n
s> Content-Type: text/plain\r\n
s> Content-Length: 88\r\n
s> \r\n
s> client MUST send Content-Type header with value: application/mercurial-exp-framing-0005\n
Request to read-only command works out of the box
$ sendhttpraw << EOF
> httprequest POST api/$HTTPV2/ro/customreadonly
> accept: $MEDIATYPE
> content-type: $MEDIATYPE
> user-agent: test
> frame 1 1 stream-begin command-request new cbor:{b'name': b'customreadonly'}
> EOF
using raw connection to peer
s> POST /api/exp-http-v2-0002/ro/customreadonly HTTP/1.1\r\n
s> Accept-Encoding: identity\r\n
s> *\r\n (glob)
s> content-type: application/mercurial-exp-framing-0005\r\n
s> user-agent: test\r\n
s> content-length: 29\r\n
s> host: $LOCALIP:$HGPORT\r\n (glob)
s> \r\n
s> \x15\x00\x00\x01\x00\x01\x01\x11\xa1DnameNcustomreadonly
s> makefile('rb', None)
s> HTTP/1.1 200 OK\r\n
s> Server: testing stub value\r\n
s> Date: $HTTP_DATE$\r\n
s> Content-Type: application/mercurial-exp-framing-0005\r\n
s> Transfer-Encoding: chunked\r\n
s> \r\n
s> 13\r\n
s> \x0b\x00\x00\x01\x00\x02\x011\xa1FstatusBok
s> \r\n
s> 27\r\n
s> \x1f\x00\x00\x01\x00\x02\x001X\x1dcustomreadonly bytes response
s> \r\n
s> 8\r\n
s> \x00\x00\x00\x01\x00\x02\x002
s> \r\n
s> 0\r\n
s> \r\n
$ sendhttpv2peer << EOF
> command customreadonly
> EOF
creating http peer for wire protocol version 2
sending customreadonly command
s> POST /api/exp-http-v2-0002/ro/customreadonly HTTP/1.1\r\n
s> Accept-Encoding: identity\r\n
s> accept: application/mercurial-exp-framing-0005\r\n
s> content-type: application/mercurial-exp-framing-0005\r\n
s> content-length: 29\r\n
s> host: $LOCALIP:$HGPORT\r\n (glob)
s> user-agent: Mercurial debugwireproto\r\n
s> \r\n
s> \x15\x00\x00\x01\x00\x01\x01\x11\xa1DnameNcustomreadonly
s> makefile('rb', None)
s> HTTP/1.1 200 OK\r\n
s> Server: testing stub value\r\n
s> Date: $HTTP_DATE$\r\n
s> Content-Type: application/mercurial-exp-framing-0005\r\n
s> Transfer-Encoding: chunked\r\n
s> \r\n
s> 13\r\n
s> \x0b\x00\x00\x01\x00\x02\x011
s> \xa1FstatusBok
s> \r\n
received frame(size=11; request=1; stream=2; streamflags=stream-begin; type=command-response; flags=continuation)
s> 27\r\n
s> \x1f\x00\x00\x01\x00\x02\x001
s> X\x1dcustomreadonly bytes response
s> \r\n
received frame(size=31; request=1; stream=2; streamflags=; type=command-response; flags=continuation)
s> 8\r\n
s> \x00\x00\x00\x01\x00\x02\x002
s> \r\n
s> 0\r\n
s> \r\n
received frame(size=0; request=1; stream=2; streamflags=; type=command-response; flags=eos)
response: gen[
b'customreadonly bytes response'
]
Request to read-write command fails because server is read-only by default
GET to read-write request yields 405
$ sendhttpraw << EOF
> httprequest GET api/$HTTPV2/rw/customreadonly
> user-agent: test
> EOF
using raw connection to peer
s> GET /api/exp-http-v2-0002/rw/customreadonly HTTP/1.1\r\n
s> Accept-Encoding: identity\r\n
s> user-agent: test\r\n
s> host: $LOCALIP:$HGPORT\r\n (glob)
s> \r\n
s> makefile('rb', None)
s> HTTP/1.1 405 Method Not Allowed\r\n
s> Server: testing stub value\r\n
s> Date: $HTTP_DATE$\r\n
s> Allow: POST\r\n
s> Content-Length: 30\r\n
s> \r\n
s> commands require POST requests
Even for unknown commands
$ sendhttpraw << EOF
> httprequest GET api/$HTTPV2/rw/badcommand
> user-agent: test
> EOF
using raw connection to peer
s> GET /api/exp-http-v2-0002/rw/badcommand HTTP/1.1\r\n
s> Accept-Encoding: identity\r\n
s> user-agent: test\r\n
s> host: $LOCALIP:$HGPORT\r\n (glob)
s> \r\n
s> makefile('rb', None)
s> HTTP/1.1 405 Method Not Allowed\r\n
s> Server: testing stub value\r\n
s> Date: $HTTP_DATE$\r\n
s> Allow: POST\r\n
s> Content-Length: 30\r\n
s> \r\n
s> commands require POST requests
SSL required by default
$ sendhttpraw << EOF
> httprequest POST api/$HTTPV2/rw/customreadonly
> user-agent: test
> EOF
using raw connection to peer
s> POST /api/exp-http-v2-0002/rw/customreadonly HTTP/1.1\r\n
s> Accept-Encoding: identity\r\n
s> user-agent: test\r\n
s> host: $LOCALIP:$HGPORT\r\n (glob)
s> \r\n
s> makefile('rb', None)
s> HTTP/1.1 403 ssl required\r\n
s> Server: testing stub value\r\n
s> Date: $HTTP_DATE$\r\n
s> Content-Length: 17\r\n
s> \r\n
s> permission denied
Restart server to allow non-ssl read-write operations
$ killdaemons.py
$ cat > server/.hg/hgrc << EOF
> [experimental]
> web.apiserver = true
> web.api.http-v2 = true
> [web]
> push_ssl = false
> allow-push = *
> EOF
$ hg -R server serve -p $HGPORT -d --pid-file hg.pid -E error.log
$ cat hg.pid > $DAEMON_PIDS
Authorized request for valid read-write command works
$ sendhttpraw << EOF
> httprequest POST api/$HTTPV2/rw/customreadonly
> user-agent: test
> accept: $MEDIATYPE
> content-type: $MEDIATYPE
> frame 1 1 stream-begin command-request new cbor:{b'name': b'customreadonly'}
> EOF
using raw connection to peer
s> POST /api/exp-http-v2-0002/rw/customreadonly HTTP/1.1\r\n
s> Accept-Encoding: identity\r\n
s> accept: application/mercurial-exp-framing-0005\r\n
s> content-type: application/mercurial-exp-framing-0005\r\n
s> user-agent: test\r\n
s> content-length: 29\r\n
s> host: $LOCALIP:$HGPORT\r\n (glob)
s> \r\n
s> \x15\x00\x00\x01\x00\x01\x01\x11\xa1DnameNcustomreadonly
s> makefile('rb', None)
s> HTTP/1.1 200 OK\r\n
s> Server: testing stub value\r\n
s> Date: $HTTP_DATE$\r\n
s> Content-Type: application/mercurial-exp-framing-0005\r\n
s> Transfer-Encoding: chunked\r\n
s> \r\n
s> 13\r\n
s> \x0b\x00\x00\x01\x00\x02\x011\xa1FstatusBok
s> \r\n
s> 27\r\n
s> \x1f\x00\x00\x01\x00\x02\x001X\x1dcustomreadonly bytes response
s> \r\n
s> 8\r\n
s> \x00\x00\x00\x01\x00\x02\x002
s> \r\n
s> 0\r\n
s> \r\n
Authorized request for unknown command is rejected
$ sendhttpraw << EOF
> httprequest POST api/$HTTPV2/rw/badcommand
> user-agent: test
> accept: $MEDIATYPE
> EOF
using raw connection to peer
s> POST /api/exp-http-v2-0002/rw/badcommand HTTP/1.1\r\n
s> Accept-Encoding: identity\r\n
s> accept: application/mercurial-exp-framing-0005\r\n
s> user-agent: test\r\n
s> host: $LOCALIP:$HGPORT\r\n (glob)
s> \r\n
s> makefile('rb', None)
s> HTTP/1.1 404 Not Found\r\n
s> Server: testing stub value\r\n
s> Date: $HTTP_DATE$\r\n
s> Content-Type: text/plain\r\n
s> Content-Length: 42\r\n
s> \r\n
s> unknown wire protocol command: badcommand\n
debugreflect isn't enabled by default
$ sendhttpraw << EOF
> httprequest POST api/$HTTPV2/ro/debugreflect
> user-agent: test
> EOF
using raw connection to peer
s> POST /api/exp-http-v2-0002/ro/debugreflect HTTP/1.1\r\n
s> Accept-Encoding: identity\r\n
s> user-agent: test\r\n
s> host: $LOCALIP:$HGPORT\r\n (glob)
s> \r\n
s> makefile('rb', None)
s> HTTP/1.1 404 Not Found\r\n
s> Server: testing stub value\r\n
s> Date: $HTTP_DATE$\r\n
s> Content-Type: text/plain\r\n
s> Content-Length: 34\r\n
s> \r\n
s> debugreflect service not available
Restart server to get debugreflect endpoint
$ killdaemons.py
$ cat > server/.hg/hgrc << EOF
> [experimental]
> web.apiserver = true
> web.api.debugreflect = true
> web.api.http-v2 = true
> [web]
> push_ssl = false
> allow-push = *
> EOF
$ hg -R server serve -p $HGPORT -d --pid-file hg.pid -E error.log
$ cat hg.pid > $DAEMON_PIDS
Command frames can be reflected via debugreflect
$ sendhttpraw << EOF
> httprequest POST api/$HTTPV2/ro/debugreflect
> accept: $MEDIATYPE
> content-type: $MEDIATYPE
> user-agent: test
> frame 1 1 stream-begin command-request new cbor:{b'name': b'command1', b'args': {b'foo': b'val1', b'bar1': b'val'}}
> EOF
using raw connection to peer
s> POST /api/exp-http-v2-0002/ro/debugreflect HTTP/1.1\r\n
s> Accept-Encoding: identity\r\n
s> accept: application/mercurial-exp-framing-0005\r\n
s> content-type: application/mercurial-exp-framing-0005\r\n
s> user-agent: test\r\n
s> content-length: 47\r\n
s> host: $LOCALIP:$HGPORT\r\n (glob)
s> \r\n
s> \'\x00\x00\x01\x00\x01\x01\x11\xa2Dargs\xa2Dbar1CvalCfooDval1DnameHcommand1
s> makefile('rb', None)
s> HTTP/1.1 200 OK\r\n
s> Server: testing stub value\r\n
s> Date: $HTTP_DATE$\r\n
s> Content-Type: text/plain\r\n
s> Content-Length: 223\r\n
s> \r\n
s> received: 1 1 1 \xa2Dargs\xa2Dbar1CvalCfooDval1DnameHcommand1\n
s> ["runcommand", {"args": {"bar1": "val", "foo": "val1"}, "command": "command1", "data": null, "redirect": null, "requestid": 1}]\n
s> received: <no frame>\n
s> {"action": "noop"}
Multiple requests to regular command URL are not allowed
$ sendhttpraw << EOF
> httprequest POST api/$HTTPV2/ro/customreadonly
> accept: $MEDIATYPE
> content-type: $MEDIATYPE
> user-agent: test
> frame 1 1 stream-begin command-request new cbor:{b'name': b'customreadonly'}
> EOF
using raw connection to peer
s> POST /api/exp-http-v2-0002/ro/customreadonly HTTP/1.1\r\n
s> Accept-Encoding: identity\r\n
s> accept: application/mercurial-exp-framing-0005\r\n
s> content-type: application/mercurial-exp-framing-0005\r\n
s> user-agent: test\r\n
s> content-length: 29\r\n
s> host: $LOCALIP:$HGPORT\r\n (glob)
s> \r\n
s> \x15\x00\x00\x01\x00\x01\x01\x11\xa1DnameNcustomreadonly
s> makefile('rb', None)
s> HTTP/1.1 200 OK\r\n
s> Server: testing stub value\r\n
s> Date: $HTTP_DATE$\r\n
s> Content-Type: application/mercurial-exp-framing-0005\r\n
s> Transfer-Encoding: chunked\r\n
s> \r\n
s> 13\r\n
s> \x0b\x00\x00\x01\x00\x02\x011\xa1FstatusBok
s> \r\n
s> 27\r\n
s> \x1f\x00\x00\x01\x00\x02\x001X\x1dcustomreadonly bytes response
s> \r\n
s> 8\r\n
s> \x00\x00\x00\x01\x00\x02\x002
s> \r\n
s> 0\r\n
s> \r\n
Multiple requests to "multirequest" URL are allowed
$ sendhttpraw << EOF
> httprequest POST api/$HTTPV2/ro/multirequest
> accept: $MEDIATYPE
> content-type: $MEDIATYPE
> user-agent: test
> frame 1 1 stream-begin command-request new cbor:{b'name': b'customreadonly'}
> frame 3 1 0 command-request new cbor:{b'name': b'customreadonly'}
> EOF
using raw connection to peer
s> POST /api/exp-http-v2-0002/ro/multirequest HTTP/1.1\r\n
s> Accept-Encoding: identity\r\n
s> *\r\n (glob)
s> *\r\n (glob)
s> user-agent: test\r\n
s> content-length: 58\r\n
s> host: $LOCALIP:$HGPORT\r\n (glob)
s> \r\n
s> \x15\x00\x00\x01\x00\x01\x01\x11\xa1DnameNcustomreadonly\x15\x00\x00\x03\x00\x01\x00\x11\xa1DnameNcustomreadonly
s> makefile('rb', None)
s> HTTP/1.1 200 OK\r\n
s> Server: testing stub value\r\n
s> Date: $HTTP_DATE$\r\n
s> Content-Type: application/mercurial-exp-framing-0005\r\n
s> Transfer-Encoding: chunked\r\n
s> \r\n
s> 13\r\n
s> \x0b\x00\x00\x01\x00\x02\x011\xa1FstatusBok
s> \r\n
s> 27\r\n
s> \x1f\x00\x00\x01\x00\x02\x001X\x1dcustomreadonly bytes response
s> \r\n
s> 8\r\n
s> \x00\x00\x00\x01\x00\x02\x002
s> \r\n
s> 13\r\n
s> \x0b\x00\x00\x03\x00\x02\x001\xa1FstatusBok
s> \r\n
s> 27\r\n
s> \x1f\x00\x00\x03\x00\x02\x001X\x1dcustomreadonly bytes response
s> \r\n
s> 8\r\n
s> \x00\x00\x00\x03\x00\x02\x002
s> \r\n
s> 0\r\n
s> \r\n
Interleaved requests to "multirequest" are processed
$ sendhttpraw << EOF
> httprequest POST api/$HTTPV2/ro/multirequest
> accept: $MEDIATYPE
> content-type: $MEDIATYPE
> user-agent: test
> frame 1 1 stream-begin command-request new|more \xa2Dargs\xa1Inamespace
> frame 3 1 0 command-request new|more \xa2Dargs\xa1Inamespace
> frame 3 1 0 command-request continuation JnamespacesDnameHlistkeys
> frame 1 1 0 command-request continuation IbookmarksDnameHlistkeys
> EOF
using raw connection to peer
s> POST /api/exp-http-v2-0002/ro/multirequest HTTP/1.1\r\n
s> Accept-Encoding: identity\r\n
s> accept: application/mercurial-exp-framing-0005\r\n
s> content-type: application/mercurial-exp-framing-0005\r\n
s> user-agent: test\r\n
s> content-length: 115\r\n
s> host: $LOCALIP:$HGPORT\r\n (glob)
s> \r\n
s> \x11\x00\x00\x01\x00\x01\x01\x15\xa2Dargs\xa1Inamespace\x11\x00\x00\x03\x00\x01\x00\x15\xa2Dargs\xa1Inamespace\x19\x00\x00\x03\x00\x01\x00\x12JnamespacesDnameHlistkeys\x18\x00\x00\x01\x00\x01\x00\x12IbookmarksDnameHlistkeys
s> makefile('rb', None)
s> HTTP/1.1 200 OK\r\n
s> Server: testing stub value\r\n
s> Date: $HTTP_DATE$\r\n
s> Content-Type: application/mercurial-exp-framing-0005\r\n
s> Transfer-Encoding: chunked\r\n
s> \r\n
s> 13\r\n
s> \x0b\x00\x00\x03\x00\x02\x011\xa1FstatusBok
s> \r\n
s> 28\r\n
s> \x00\x00\x03\x00\x02\x001\xa3Ibookmarks@Jnamespaces@Fphases@
s> \r\n
s> 8\r\n
s> \x00\x00\x00\x03\x00\x02\x002
s> \r\n
s> 13\r\n
s> \x0b\x00\x00\x01\x00\x02\x001\xa1FstatusBok
s> \r\n
s> 9\r\n
s> \x01\x00\x00\x01\x00\x02\x001\xa0
s> \r\n
s> 8\r\n
s> \x00\x00\x00\x01\x00\x02\x002
s> \r\n
s> 0\r\n
s> \r\n
Restart server to disable read-write access
$ killdaemons.py
$ cat > server/.hg/hgrc << EOF
> [experimental]
> web.apiserver = true
> web.api.debugreflect = true
> web.api.http-v2 = true
> [web]
> push_ssl = false
> EOF
$ hg -R server serve -p $HGPORT -d --pid-file hg.pid -E error.log
$ cat hg.pid > $DAEMON_PIDS
Attempting to run a read-write command via multirequest on read-only URL is not allowed
$ sendhttpraw << EOF
> httprequest POST api/$HTTPV2/ro/multirequest
> accept: $MEDIATYPE
> content-type: $MEDIATYPE
> user-agent: test
> frame 1 1 stream-begin command-request new cbor:{b'name': b'pushkey'}
> EOF
using raw connection to peer
s> POST /api/exp-http-v2-0002/ro/multirequest HTTP/1.1\r\n
s> Accept-Encoding: identity\r\n
s> accept: application/mercurial-exp-framing-0005\r\n
s> content-type: application/mercurial-exp-framing-0005\r\n
s> user-agent: test\r\n
s> content-length: 22\r\n
s> host: $LOCALIP:$HGPORT\r\n (glob)
s> \r\n
s> \x0e\x00\x00\x01\x00\x01\x01\x11\xa1DnameGpushkey
s> makefile('rb', None)
s> HTTP/1.1 403 Forbidden\r\n
s> Server: testing stub value\r\n
s> Date: $HTTP_DATE$\r\n
s> Content-Type: text/plain\r\n
s> Content-Length: 52\r\n
s> \r\n
s> insufficient permissions to execute command: pushkey
$ cat error.log