diff --git a/mercurial/help/internals/wireprotocol.txt b/mercurial/help/internals/wireprotocol.txt
--- a/mercurial/help/internals/wireprotocol.txt
+++ b/mercurial/help/internals/wireprotocol.txt
@@ -1831,6 +1831,52 @@
    requirements can be used to determine whether a client can read a
    *raw* copy of file data available.
 
+filehistory
+-----------
+
+Obtain history for a specific tracked path.
+
+The command accepts the following arguments:
+
+path
+   (bytestring) The name of the tracked path.
+
+filenodeheads
+   (array of bytestrings) File nodes where ancestry traversal will
+   initiate. If the array is empty, all DAG heads will be considered.
+
+filenodebases
+   (array of bytestrings) File nodes where ancestry traversal will stop.
+
+The response is a series of CBOR maps (not part of any outer container)
+containing file history records. The records are emitted in topological
+order (parents are emitted before their children). Nodes in
+``filenodebases`` are never included. Nodes in ``filenodesheads`` are
+included, unless they are members of ``filenodebases``.
+
+Each history map contains the following bytestring keys:
+
+node
+   (bytestring) Node for this file revision.
+
+p1node
+   (bytestring) Node for 1st parent of this revision.
+
+p2node
+   (bytestring) Node for 2nd parent of this revision.
+
+linknode
+   (bytestring) Node of changeset this revision is associated with.
+
+copyinfo (optional)
+   (Array of bytestrings) Contained the file path and file node value
+   from which this revision was copied.
+
+censored (optional)
+   (True) If present, the value is always True and indicates that the
+   content for this revision has been *censored* and is no longer
+   available. Attempts to fetch the revision data will fail.
+
 heads
 -----
 
diff --git a/mercurial/wireprotov2server.py b/mercurial/wireprotov2server.py
--- a/mercurial/wireprotov2server.py
+++ b/mercurial/wireprotov2server.py
@@ -13,6 +13,7 @@
     cbor,
 )
 from . import (
+    ancestor,
     encoding,
     error,
     pycompat,
@@ -471,6 +472,72 @@
 
     return wireprototypes.cborresponse(caps)
 
+@wireprotocommand('filehistory',
+                  args={
+                      'path': b'path/to/file',
+                      'filenodeheads': [b'deadbeef'],
+                      'filenodebases': [b'deadbeef'],
+                  },
+                  permission='pull')
+def filehistory(repo, proto, path, filenodeheads, filenodebases):
+    # This seems to work even if the file doesn't exist. So catch
+    # "empty" files and return an error.
+    fl = repo.file(path)
+
+    if not len(fl):
+        return wireprototypes.v2errorresponse('unknown file: %s', (path))
+
+    clnode = repo.changelog.node
+    getnode = fl.node
+    parents = fl.parents
+    linkrev = fl.linkrev
+    iscensored = fl.iscensored
+
+    try:
+        headrevs = [fl.rev(n) for n in filenodeheads]
+        stoprevs = [fl.rev(n) for n in filenodebases]
+    except error.LookupError as e:
+        return wireprototypes.v2errorresponse('failed to resolve node: %s',
+                                              (e.name,))
+
+    if not headrevs:
+        headrevs = fl.headrevs()
+
+    clrevs = {r for r in repo.changelog}
+    linkrevs = [(r, linkrev(r)) for r in fl]
+    linknodes = {getnode(r): clnode(lr) for r, lr in linkrevs if lr in clrevs}
+
+    def senddata():
+        ima = ancestor.incrementalmissingancestors(fl.parentrevs, stoprevs)
+
+        for rev in ima.missingancestors(headrevs):
+            node = getnode(rev)
+            p1node, p2node = parents(node)
+            renamed = fl.renamed(node)
+
+            res = {
+                b'node': node,
+                b'p1node': p1node,
+                b'p2node': p2node,
+            }
+
+            # TODO what is the most efficient way to resolve linknodes if the
+            # original changeset is hidden?
+            linknode = linknodes.get(node)
+            if linknode:
+                res[b'linknode'] = linknode
+
+            if iscensored(rev):
+                res[b'censored'] = True
+
+            if renamed:
+                res[b'copyinfo'] = renamed
+
+            for chunk in cborutil.streamencodemap(res):
+                yield chunk
+
+    return wireprototypes.v2streamingresponse(senddata())
+
 @wireprotocommand('heads',
                   args={
                       'publiconly': False,
diff --git a/tests/test-http-protocol.t b/tests/test-http-protocol.t
--- a/tests/test-http-protocol.t
+++ b/tests/test-http-protocol.t
@@ -305,7 +305,7 @@
   s>     Content-Type: application/mercurial-cbor\r\n
   s>     Content-Length: *\r\n (glob)
   s>     \r\n
-  s>     \xa3Dapis\xa1Pexp-http-v2-0001\xa4Hcommands\xa8Eheads\xa2Dargs\xa1Jpubliconly\xf4Kpermissions\x81DpullEknown\xa2Dargs\xa1Enodes\x81HdeadbeefKpermissions\x81DpullFlookup\xa2Dargs\xa1CkeyCfooKpermissions\x81DpullGpushkey\xa2Dargs\xa4CkeyCkeyCnewCnewColdColdInamespaceBnsKpermissions\x81DpushHlistkeys\xa2Dargs\xa1InamespaceBnsKpermissions\x81DpullIbranchmap\xa2Dargs\xa0Kpermissions\x81DpullLcapabilities\xa2Dargs\xa0Kpermissions\x81DpullLrawstorefile\xa2Dargs\xa1DwhatIchangelogKpermissions\x81DpullKcompression\x81\xa1DnameDzlibNrawrepoformats\x82LgeneraldeltaHrevlogv1Qframingmediatypes\x81X&application/mercurial-exp-framing-0005GapibaseDapi/Nv1capabilitiesY\x01\xc5batch branchmap $USUAL_BUNDLE2_CAPS_SERVER$ changegroupsubset compression=$BUNDLE2_COMPRESSIONS$ getbundle httpheader=1024 httpmediatype=0.1rx,0.1tx,0.2tx known lookup pushkey streamreqs=generaldelta,revlogv1 unbundle=HG10GZ,HG10BZ,HG10UN unbundlehash
+  s>     \xa3Dapis\xa1Pexp-http-v2-0001\xa4Hcommands\xa9Eheads\xa2Dargs\xa1Jpubliconly\xf4Kpermissions\x81DpullEknown\xa2Dargs\xa1Enodes\x81HdeadbeefKpermissions\x81DpullFlookup\xa2Dargs\xa1CkeyCfooKpermissions\x81DpullGpushkey\xa2Dargs\xa4CkeyCkeyCnewCnewColdColdInamespaceBnsKpermissions\x81DpushHlistkeys\xa2Dargs\xa1InamespaceBnsKpermissions\x81DpullIbranchmap\xa2Dargs\xa0Kpermissions\x81DpullKfilehistory\xa2Dargs\xa3DpathLpath/to/fileMfilenodebases\x81HdeadbeefMfilenodeheads\x81HdeadbeefKpermissions\x81DpullLcapabilities\xa2Dargs\xa0Kpermissions\x81DpullLrawstorefile\xa2Dargs\xa1DwhatIchangelogKpermissions\x81DpullKcompression\x81\xa1DnameDzlibNrawrepoformats\x82LgeneraldeltaHrevlogv1Qframingmediatypes\x81X&application/mercurial-exp-framing-0005GapibaseDapi/Nv1capabilitiesY\x01\xc5batch branchmap $USUAL_BUNDLE2_CAPS_SERVER$ changegroupsubset compression=$BUNDLE2_COMPRESSIONS$ getbundle httpheader=1024 httpmediatype=0.1rx,0.1tx,0.2tx known lookup pushkey streamreqs=generaldelta,revlogv1 unbundle=HG10GZ,HG10BZ,HG10UN unbundlehash
   sending heads command
   s>     POST /api/exp-http-v2-0001/ro/heads HTTP/1.1\r\n
   s>     Accept-Encoding: identity\r\n
diff --git a/tests/test-wireproto-command-capabilities.t b/tests/test-wireproto-command-capabilities.t
--- a/tests/test-wireproto-command-capabilities.t
+++ b/tests/test-wireproto-command-capabilities.t
@@ -202,8 +202,8 @@
   s>     Content-Type: application/mercurial-cbor\r\n
   s>     Content-Length: *\r\n (glob)
   s>     \r\n
-  s>     \xa3Dapis\xa1Pexp-http-v2-0001\xa4Hcommands\xa8Eheads\xa2Dargs\xa1Jpubliconly\xf4Kpermissions\x81DpullEknown\xa2Dargs\xa1Enodes\x81HdeadbeefKpermissions\x81DpullFlookup\xa2Dargs\xa1CkeyCfooKpermissions\x81DpullGpushkey\xa2Dargs\xa4CkeyCkeyCnewCnewColdColdInamespaceBnsKpermissions\x81DpushHlistkeys\xa2Dargs\xa1InamespaceBnsKpermissions\x81DpullIbranchmap\xa2Dargs\xa0Kpermissions\x81DpullLcapabilities\xa2Dargs\xa0Kpermissions\x81DpullLrawstorefile\xa2Dargs\xa1DwhatIchangelogKpermissions\x81DpullKcompression\x81\xa1DnameDzlibNrawrepoformats\x82LgeneraldeltaHrevlogv1Qframingmediatypes\x81X&application/mercurial-exp-framing-0005GapibaseDapi/Nv1capabilitiesY\x01\xc5batch branchmap $USUAL_BUNDLE2_CAPS_SERVER$ changegroupsubset compression=$BUNDLE2_COMPRESSIONS$ getbundle httpheader=1024 httpmediatype=0.1rx,0.1tx,0.2tx known lookup pushkey streamreqs=generaldelta,revlogv1 unbundle=HG10GZ,HG10BZ,HG10UN unbundlehash
-  cbor> {b'apibase': b'api/', b'apis': {b'exp-http-v2-0001': {b'commands': {b'branchmap': {b'args': {}, b'permissions': [b'pull']}, b'capabilities': {b'args': {}, b'permissions': [b'pull']}, b'heads': {b'args': {b'publiconly': False}, b'permissions': [b'pull']}, b'known': {b'args': {b'nodes': [b'deadbeef']}, b'permissions': [b'pull']}, b'listkeys': {b'args': {b'namespace': b'ns'}, b'permissions': [b'pull']}, b'lookup': {b'args': {b'key': b'foo'}, b'permissions': [b'pull']}, b'pushkey': {b'args': {b'key': b'key', b'namespace': b'ns', b'new': b'new', b'old': b'old'}, b'permissions': [b'push']}, b'rawstorefile': {b'args': {b'what': b'changelog'}, b'permissions': [b'pull']}}, b'compression': [{b'name': b'zlib'}], b'framingmediatypes': [b'application/mercurial-exp-framing-0005'], b'rawrepoformats': [b'generaldelta', b'revlogv1']}}, b'v1capabilities': b'batch branchmap $USUAL_BUNDLE2_CAPS_SERVER$ changegroupsubset compression=$BUNDLE2_COMPRESSIONS$ getbundle httpheader=1024 httpmediatype=0.1rx,0.1tx,0.2tx known lookup pushkey streamreqs=generaldelta,revlogv1 unbundle=HG10GZ,HG10BZ,HG10UN unbundlehash'}
+  s>     \xa3Dapis\xa1Pexp-http-v2-0001\xa4Hcommands\xa9Eheads\xa2Dargs\xa1Jpubliconly\xf4Kpermissions\x81DpullEknown\xa2Dargs\xa1Enodes\x81HdeadbeefKpermissions\x81DpullFlookup\xa2Dargs\xa1CkeyCfooKpermissions\x81DpullGpushkey\xa2Dargs\xa4CkeyCkeyCnewCnewColdColdInamespaceBnsKpermissions\x81DpushHlistkeys\xa2Dargs\xa1InamespaceBnsKpermissions\x81DpullIbranchmap\xa2Dargs\xa0Kpermissions\x81DpullKfilehistory\xa2Dargs\xa3DpathLpath/to/fileMfilenodebases\x81HdeadbeefMfilenodeheads\x81HdeadbeefKpermissions\x81DpullLcapabilities\xa2Dargs\xa0Kpermissions\x81DpullLrawstorefile\xa2Dargs\xa1DwhatIchangelogKpermissions\x81DpullKcompression\x81\xa1DnameDzlibNrawrepoformats\x82LgeneraldeltaHrevlogv1Qframingmediatypes\x81X&application/mercurial-exp-framing-0005GapibaseDapi/Nv1capabilitiesY\x01\xc5batch branchmap $USUAL_BUNDLE2_CAPS_SERVER$ changegroupsubset compression=$BUNDLE2_COMPRESSIONS$ getbundle httpheader=1024 httpmediatype=0.1rx,0.1tx,0.2tx known lookup pushkey streamreqs=generaldelta,revlogv1 unbundle=HG10GZ,HG10BZ,HG10UN unbundlehash
+  cbor> {b'apibase': b'api/', b'apis': {b'exp-http-v2-0001': {b'commands': {b'branchmap': {b'args': {}, b'permissions': [b'pull']}, b'capabilities': {b'args': {}, b'permissions': [b'pull']}, b'filehistory': {b'args': {b'filenodebases': [b'deadbeef'], b'filenodeheads': [b'deadbeef'], b'path': b'path/to/file'}, b'permissions': [b'pull']}, b'heads': {b'args': {b'publiconly': False}, b'permissions': [b'pull']}, b'known': {b'args': {b'nodes': [b'deadbeef']}, b'permissions': [b'pull']}, b'listkeys': {b'args': {b'namespace': b'ns'}, b'permissions': [b'pull']}, b'lookup': {b'args': {b'key': b'foo'}, b'permissions': [b'pull']}, b'pushkey': {b'args': {b'key': b'key', b'namespace': b'ns', b'new': b'new', b'old': b'old'}, b'permissions': [b'push']}, b'rawstorefile': {b'args': {b'what': b'changelog'}, b'permissions': [b'pull']}}, b'compression': [{b'name': b'zlib'}], b'framingmediatypes': [b'application/mercurial-exp-framing-0005'], b'rawrepoformats': [b'generaldelta', b'revlogv1']}}, b'v1capabilities': b'batch branchmap $USUAL_BUNDLE2_CAPS_SERVER$ changegroupsubset compression=$BUNDLE2_COMPRESSIONS$ getbundle httpheader=1024 httpmediatype=0.1rx,0.1tx,0.2tx known lookup pushkey streamreqs=generaldelta,revlogv1 unbundle=HG10GZ,HG10BZ,HG10UN unbundlehash'}
 
 capabilities command returns expected info
 
@@ -227,7 +227,7 @@
   s>     Content-Type: application/mercurial-cbor\r\n
   s>     Content-Length: *\r\n (glob)
   s>     \r\n
-  s>     \xa3Dapis\xa1Pexp-http-v2-0001\xa4Hcommands\xa8Eheads\xa2Dargs\xa1Jpubliconly\xf4Kpermissions\x81DpullEknown\xa2Dargs\xa1Enodes\x81HdeadbeefKpermissions\x81DpullFlookup\xa2Dargs\xa1CkeyCfooKpermissions\x81DpullGpushkey\xa2Dargs\xa4CkeyCkeyCnewCnewColdColdInamespaceBnsKpermissions\x81DpushHlistkeys\xa2Dargs\xa1InamespaceBnsKpermissions\x81DpullIbranchmap\xa2Dargs\xa0Kpermissions\x81DpullLcapabilities\xa2Dargs\xa0Kpermissions\x81DpullLrawstorefile\xa2Dargs\xa1DwhatIchangelogKpermissions\x81DpullKcompression\x81\xa1DnameDzlibNrawrepoformats\x82LgeneraldeltaHrevlogv1Qframingmediatypes\x81X&application/mercurial-exp-framing-0005GapibaseDapi/Nv1capabilitiesY\x01\xc5batch branchmap $USUAL_BUNDLE2_CAPS_SERVER$ changegroupsubset compression=$BUNDLE2_COMPRESSIONS$ getbundle httpheader=1024 httpmediatype=0.1rx,0.1tx,0.2tx known lookup pushkey streamreqs=generaldelta,revlogv1 unbundle=HG10GZ,HG10BZ,HG10UN unbundlehash
+  s>     \xa3Dapis\xa1Pexp-http-v2-0001\xa4Hcommands\xa9Eheads\xa2Dargs\xa1Jpubliconly\xf4Kpermissions\x81DpullEknown\xa2Dargs\xa1Enodes\x81HdeadbeefKpermissions\x81DpullFlookup\xa2Dargs\xa1CkeyCfooKpermissions\x81DpullGpushkey\xa2Dargs\xa4CkeyCkeyCnewCnewColdColdInamespaceBnsKpermissions\x81DpushHlistkeys\xa2Dargs\xa1InamespaceBnsKpermissions\x81DpullIbranchmap\xa2Dargs\xa0Kpermissions\x81DpullKfilehistory\xa2Dargs\xa3DpathLpath/to/fileMfilenodebases\x81HdeadbeefMfilenodeheads\x81HdeadbeefKpermissions\x81DpullLcapabilities\xa2Dargs\xa0Kpermissions\x81DpullLrawstorefile\xa2Dargs\xa1DwhatIchangelogKpermissions\x81DpullKcompression\x81\xa1DnameDzlibNrawrepoformats\x82LgeneraldeltaHrevlogv1Qframingmediatypes\x81X&application/mercurial-exp-framing-0005GapibaseDapi/Nv1capabilitiesY\x01\xc5batch branchmap $USUAL_BUNDLE2_CAPS_SERVER$ changegroupsubset compression=$BUNDLE2_COMPRESSIONS$ getbundle httpheader=1024 httpmediatype=0.1rx,0.1tx,0.2tx known lookup pushkey streamreqs=generaldelta,revlogv1 unbundle=HG10GZ,HG10BZ,HG10UN unbundlehash
   sending capabilities command
   s>     POST /api/exp-http-v2-0001/ro/capabilities HTTP/1.1\r\n
   s>     Accept-Encoding: identity\r\n
@@ -245,13 +245,13 @@
   s>     Content-Type: application/mercurial-exp-framing-0005\r\n
   s>     Transfer-Encoding: chunked\r\n
   s>     \r\n
-  s>     20c\r\n
-  s>     \x04\x02\x00\x01\x00\x02\x012
-  s>     \xa1FstatusBok\xa4Hcommands\xa8Eheads\xa2Dargs\xa1Jpubliconly\xf4Kpermissions\x81DpullEknown\xa2Dargs\xa1Enodes\x81HdeadbeefKpermissions\x81DpullFlookup\xa2Dargs\xa1CkeyCfooKpermissions\x81DpullGpushkey\xa2Dargs\xa4CkeyCkeyCnewCnewColdColdInamespaceBnsKpermissions\x81DpushHlistkeys\xa2Dargs\xa1InamespaceBnsKpermissions\x81DpullIbranchmap\xa2Dargs\xa0Kpermissions\x81DpullLcapabilities\xa2Dargs\xa0Kpermissions\x81DpullLrawstorefile\xa2Dargs\xa1DwhatIchangelogKpermissions\x81DpullKcompression\x81\xa1DnameDzlibNrawrepoformats\x82LgeneraldeltaHrevlogv1Qframingmediatypes\x81X&application/mercurial-exp-framing-0005
+  s>     273\r\n
+  s>     k\x02\x00\x01\x00\x02\x012
+  s>     \xa1FstatusBok\xa4Hcommands\xa9Eheads\xa2Dargs\xa1Jpubliconly\xf4Kpermissions\x81DpullEknown\xa2Dargs\xa1Enodes\x81HdeadbeefKpermissions\x81DpullFlookup\xa2Dargs\xa1CkeyCfooKpermissions\x81DpullGpushkey\xa2Dargs\xa4CkeyCkeyCnewCnewColdColdInamespaceBnsKpermissions\x81DpushHlistkeys\xa2Dargs\xa1InamespaceBnsKpermissions\x81DpullIbranchmap\xa2Dargs\xa0Kpermissions\x81DpullKfilehistory\xa2Dargs\xa3DpathLpath/to/fileMfilenodebases\x81HdeadbeefMfilenodeheads\x81HdeadbeefKpermissions\x81DpullLcapabilities\xa2Dargs\xa0Kpermissions\x81DpullLrawstorefile\xa2Dargs\xa1DwhatIchangelogKpermissions\x81DpullKcompression\x81\xa1DnameDzlibNrawrepoformats\x82LgeneraldeltaHrevlogv1Qframingmediatypes\x81X&application/mercurial-exp-framing-0005
   s>     \r\n
-  received frame(size=516; request=1; stream=2; streamflags=stream-begin; type=command-response; flags=eos)
+  received frame(size=619; request=1; stream=2; streamflags=stream-begin; type=command-response; flags=eos)
   s>     0\r\n
   s>     \r\n
-  response: [{b'status': b'ok'}, {b'commands': {b'branchmap': {b'args': {}, b'permissions': [b'pull']}, b'capabilities': {b'args': {}, b'permissions': [b'pull']}, b'heads': {b'args': {b'publiconly': False}, b'permissions': [b'pull']}, b'known': {b'args': {b'nodes': [b'deadbeef']}, b'permissions': [b'pull']}, b'listkeys': {b'args': {b'namespace': b'ns'}, b'permissions': [b'pull']}, b'lookup': {b'args': {b'key': b'foo'}, b'permissions': [b'pull']}, b'pushkey': {b'args': {b'key': b'key', b'namespace': b'ns', b'new': b'new', b'old': b'old'}, b'permissions': [b'push']}, b'rawstorefile': {b'args': {b'what': b'changelog'}, b'permissions': [b'pull']}}, b'compression': [{b'name': b'zlib'}], b'framingmediatypes': [b'application/mercurial-exp-framing-0005'], b'rawrepoformats': [b'generaldelta', b'revlogv1']}]
+  response: [{b'status': b'ok'}, {b'commands': {b'branchmap': {b'args': {}, b'permissions': [b'pull']}, b'capabilities': {b'args': {}, b'permissions': [b'pull']}, b'filehistory': {b'args': {b'filenodebases': [b'deadbeef'], b'filenodeheads': [b'deadbeef'], b'path': b'path/to/file'}, b'permissions': [b'pull']}, b'heads': {b'args': {b'publiconly': False}, b'permissions': [b'pull']}, b'known': {b'args': {b'nodes': [b'deadbeef']}, b'permissions': [b'pull']}, b'listkeys': {b'args': {b'namespace': b'ns'}, b'permissions': [b'pull']}, b'lookup': {b'args': {b'key': b'foo'}, b'permissions': [b'pull']}, b'pushkey': {b'args': {b'key': b'key', b'namespace': b'ns', b'new': b'new', b'old': b'old'}, b'permissions': [b'push']}, b'rawstorefile': {b'args': {b'what': b'changelog'}, b'permissions': [b'pull']}}, b'compression': [{b'name': b'zlib'}], b'framingmediatypes': [b'application/mercurial-exp-framing-0005'], b'rawrepoformats': [b'generaldelta', b'revlogv1']}]
 
   $ cat error.log
diff --git a/tests/test-wireproto-command-filehistory.t b/tests/test-wireproto-command-filehistory.t
new file mode 100644
--- /dev/null
+++ b/tests/test-wireproto-command-filehistory.t
@@ -0,0 +1,279 @@
+  $ . $TESTDIR/wireprotohelpers.sh
+
+  $ hg init server
+  $ enablehttpv2 server
+
+  $ cd server
+
+  $ echo a0 > a
+  $ echo b0 > b
+  $ echo c0 > c
+  $ mkdir dir0
+  $ echo d0 > dir0/d
+  $ echo e1 > dir0/e
+  $ hg -q commit -A -m initial
+
+  $ echo a1 > a
+  $ hg commit -m 'commit 2'
+  $ echo a2 > a
+  $ hg commit -m 'commit 3'
+  $ hg up -r 0
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ echo a1-branches > a
+  $ hg commit -m 'commit 4 (new head)'
+  created new head
+
+  $ hg up 3
+  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ hg mv c c-moved
+  $ hg commit -m 'commit 5 (moved c)'
+
+  $ cd ..
+
+  $ hg -R server serve -p $HGPORT -d --pid-file hg.pid -E error.log
+  $ cat hg.pid > $DAEMON_PIDS
+
+Invalid path yields a sensible error
+
+  $ sendhttpv2peer << EOF
+  > command filehistory
+  >     path does/not/exist
+  >     filenodeheads eval:[]
+  >     filenodebases eval:[]
+  > EOF
+  creating http peer for wire protocol version 2
+  sending filehistory command
+  s>     POST /api/exp-http-v2-0001/ro/filehistory 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: 82\r\n
+  s>     host: $LOCALIP:$HGPORT\r\n (glob)
+  s>     user-agent: Mercurial debugwireproto\r\n
+  s>     \r\n
+  s>     J\x00\x00\x01\x00\x01\x01\x11\xa2Dargs\xa3DpathNdoes/not/existMfilenodebases\x80Mfilenodeheads\x80DnameKfilehistory
+  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>     4a\r\n
+  s>     B\x00\x00\x01\x00\x02\x012
+  s>     \xa2Eerror\xa2DargsNdoes/not/existGmessagePunknown file: %sFstatusEerror
+  s>     \r\n
+  received frame(size=66; request=1; stream=2; streamflags=stream-begin; type=command-response; flags=eos)
+  s>     0\r\n
+  s>     \r\n
+  response: [{b'error': {b'args': b'does/not/exist', b'message': b'unknown file: %s'}, b'status': b'error'}]
+
+Bad file node in heads yields a sensible error
+
+  $ sendhttpv2peer << EOF
+  > command filehistory
+  >    path a
+  >    filenodeheads eval:[b'\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa']
+  >    filenodebases eval:[]
+  > EOF
+  creating http peer for wire protocol version 2
+  sending filehistory command
+  s>     POST /api/exp-http-v2-0001/ro/filehistory 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: 90\r\n
+  s>     host: $LOCALIP:$HGPORT\r\n (glob)
+  s>     user-agent: Mercurial debugwireproto\r\n
+  s>     \r\n
+  s>     R\x00\x00\x01\x00\x01\x01\x11\xa2Dargs\xa3DpathAaMfilenodebases\x80Mfilenodeheads\x81T\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaaDnameKfilehistory
+  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>     5c\r\n
+  s>     T\x00\x00\x01\x00\x02\x012
+  s>     \xa2Eerror\xa2Dargs\x81T\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaaGmessageX\x1afailed to resolve node: %sFstatusEerror
+  s>     \r\n
+  received frame(size=84; request=1; stream=2; streamflags=stream-begin; type=command-response; flags=eos)
+  s>     0\r\n
+  s>     \r\n
+  response: [{b'error': {b'args': [b'\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa'], b'message': b'failed to resolve node: %s'}, b'status': b'error'}]
+
+Bad file node in bases yields a sensible error
+
+  $ sendhttpv2peer << EOF
+  > command filehistory
+  >    path a
+  >    filenodeheads eval:[]
+  >    filenodebases eval:[b'\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb']
+  > EOF
+  creating http peer for wire protocol version 2
+  sending filehistory command
+  s>     POST /api/exp-http-v2-0001/ro/filehistory 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: 90\r\n
+  s>     host: $LOCALIP:$HGPORT\r\n (glob)
+  s>     user-agent: Mercurial debugwireproto\r\n
+  s>     \r\n
+  s>     R\x00\x00\x01\x00\x01\x01\x11\xa2Dargs\xa3DpathAaMfilenodebases\x81T\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbbMfilenodeheads\x80DnameKfilehistory
+  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>     5c\r\n
+  s>     T\x00\x00\x01\x00\x02\x012
+  s>     \xa2Eerror\xa2Dargs\x81T\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbbGmessageX\x1afailed to resolve node: %sFstatusEerror
+  s>     \r\n
+  received frame(size=84; request=1; stream=2; streamflags=stream-begin; type=command-response; flags=eos)
+  s>     0\r\n
+  s>     \r\n
+  response: [{b'error': {b'args': [b'\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb\xbb'], b'message': b'failed to resolve node: %s'}, b'status': b'error'}]
+
+Requesting history with empty heads and bases retrieves full DAG
+
+  $ sendhttpv2peer << EOF
+  > command filehistory
+  >    path a
+  >    filenodeheads eval:[]
+  >    filenodebases eval:[]
+  > EOF
+  creating http peer for wire protocol version 2
+  sending filehistory command
+  s>     POST /api/exp-http-v2-0001/ro/filehistory 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: 69\r\n
+  s>     host: $LOCALIP:$HGPORT\r\n (glob)
+  s>     user-agent: Mercurial debugwireproto\r\n
+  s>     \r\n
+  s>     =\x00\x00\x01\x00\x01\x01\x11\xa2Dargs\xa3DpathAaMfilenodebases\x80Mfilenodeheads\x80DnameKfilehistory
+  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>     1cc\r\n
+  s>     \xc4\x01\x00\x01\x00\x02\x000
+  s>     \xa4HlinknodeT\xfd\x8dO6\xd3@\xdb\x7f\xa4Y\x10\x078k\xac\x0c\xc1\xb2#\xd0DnodeT+N\xb0s\x19\xbf\xa0w\xa4\n
+  s>     /\x04\x916Y\xae\xf0\xdaB\xdaFp1nodeT\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00Fp2nodeT\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xa4HlinknodeT\x04\x03\xe9K\x8c\xe4e\xa1\xf6\x99;\xb1\xe4`{\xbe\x17`V\xa7DnodeT\x9a8\x12)\x97\xb3\xac\x97\xbe*\x9a\xa2\xe5V\x83\x83A\xfd\xf2\xccFp1nodeT+N\xb0s\x19\xbf\xa0w\xa4\n
+  s>     /\x04\x916Y\xae\xf0\xdaB\xdaFp2nodeT\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xa4HlinknodeT\x0e\xb5\x06\x83\x84\x08E\xf3\xa7R\x8a}\xf3+l\xe2\x1c1J\x19DnodeT\xc2\xa2\x05\xc8\xb2\xad\xe2J\xf2`b\xe5<\xd5\xbc8\x01\xd6`\xdaFp1nodeT\x9a8\x12)\x97\xb3\xac\x97\xbe*\x9a\xa2\xe5V\x83\x83A\xfd\xf2\xccFp2nodeT\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xa4HlinknodeT\x15_\xcd\xfdBs\xeb\xeb\\.T\xd1\xc8q\x1f\xfd\xc2\x993\xabDnodeT6\xb6\x17\xab\xfb\x82\x98\x83\xcd\xd6\x07g\xd1e\xeaEM\xd8\x17&Fp1nodeT+N\xb0s\x19\xbf\xa0w\xa4\n
+  s>     /\x04\x916Y\xae\xf0\xdaB\xdaFp2nodeT\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00
+  s>     \r\n
+  received frame(size=452; request=1; stream=2; streamflags=; type=command-response; flags=)
+  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: [{b'status': b'ok'}, {b'linknode': b'\xfd\x8dO6\xd3@\xdb\x7f\xa4Y\x10\x078k\xac\x0c\xc1\xb2#\xd0', b'node': b'+N\xb0s\x19\xbf\xa0w\xa4\n/\x04\x916Y\xae\xf0\xdaB\xda', b'p1node': b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00', b'p2node': b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'}, {b'linknode': b'\x04\x03\xe9K\x8c\xe4e\xa1\xf6\x99;\xb1\xe4`{\xbe\x17`V\xa7', b'node': b'\x9a8\x12)\x97\xb3\xac\x97\xbe*\x9a\xa2\xe5V\x83\x83A\xfd\xf2\xcc', b'p1node': b'+N\xb0s\x19\xbf\xa0w\xa4\n/\x04\x916Y\xae\xf0\xdaB\xda', b'p2node': b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'}, {b'linknode': b'\x0e\xb5\x06\x83\x84\x08E\xf3\xa7R\x8a}\xf3+l\xe2\x1c1J\x19', b'node': b'\xc2\xa2\x05\xc8\xb2\xad\xe2J\xf2`b\xe5<\xd5\xbc8\x01\xd6`\xda', b'p1node': b'\x9a8\x12)\x97\xb3\xac\x97\xbe*\x9a\xa2\xe5V\x83\x83A\xfd\xf2\xcc', b'p2node': b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'}, {b'linknode': b'\x15_\xcd\xfdBs\xeb\xeb\\.T\xd1\xc8q\x1f\xfd\xc2\x993\xab', b'node': b'6\xb6\x17\xab\xfb\x82\x98\x83\xcd\xd6\x07g\xd1e\xeaEM\xd8\x17&', b'p1node': b'+N\xb0s\x19\xbf\xa0w\xa4\n/\x04\x916Y\xae\xf0\xdaB\xda', b'p2node': b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'}]
+
+Requesting history with a pinned head limits results to that head
+
+  $ sendhttpv2peer << EOF
+  > command filehistory
+  >    path a
+  >    filenodeheads eval:[b'+N\xb0s\x19\xbf\xa0w\xa4\n/\x04\x916Y\xae\xf0\xdaB\xda']
+  >    filenodebases eval:[]
+  > EOF
+  creating http peer for wire protocol version 2
+  sending filehistory command
+  s>     POST /api/exp-http-v2-0001/ro/filehistory 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: 90\r\n
+  s>     host: $LOCALIP:$HGPORT\r\n (glob)
+  s>     user-agent: Mercurial debugwireproto\r\n
+  s>     \r\n
+  s>     R\x00\x00\x01\x00\x01\x01\x11\xa2Dargs\xa3DpathAaMfilenodebases\x80Mfilenodeheads\x81T+N\xb0s\x19\xbf\xa0w\xa4\n
+  s>     /\x04\x916Y\xae\xf0\xdaB\xdaDnameKfilehistory
+  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>     79\r\n
+  s>     q\x00\x00\x01\x00\x02\x000
+  s>     \xa4HlinknodeT\xfd\x8dO6\xd3@\xdb\x7f\xa4Y\x10\x078k\xac\x0c\xc1\xb2#\xd0DnodeT+N\xb0s\x19\xbf\xa0w\xa4\n
+  s>     /\x04\x916Y\xae\xf0\xdaB\xdaFp1nodeT\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00Fp2nodeT\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00
+  s>     \r\n
+  received frame(size=113; request=1; stream=2; streamflags=; type=command-response; flags=)
+  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: [{b'status': b'ok'}, {b'linknode': b'\xfd\x8dO6\xd3@\xdb\x7f\xa4Y\x10\x078k\xac\x0c\xc1\xb2#\xd0', b'node': b'+N\xb0s\x19\xbf\xa0w\xa4\n/\x04\x916Y\xae\xf0\xdaB\xda', b'p1node': b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00', b'p2node': b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'}]
+
+Requesting history with bases does not send history for those bases and ancestors
+
+  $ sendhttpv2peer << EOF
+  > command filehistory
+  >     path a
+  >     filenodeheads eval:[]
+  >     filenodebases eval:[b'\xc2\xa2\x05\xc8\xb2\xad\xe2J\xf2\x60b\xe5<\xd5\xbc8\x01\xd6\x60\xda']
+  > EOF
+  creating http peer for wire protocol version 2
+  sending filehistory command
+  s>     POST /api/exp-http-v2-0001/ro/filehistory 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: 90\r\n
+  s>     host: $LOCALIP:$HGPORT\r\n (glob)
+  s>     user-agent: Mercurial debugwireproto\r\n
+  s>     \r\n
+  s>     R\x00\x00\x01\x00\x01\x01\x11\xa2Dargs\xa3DpathAaMfilenodebases\x81T\xc2\xa2\x05\xc8\xb2\xad\xe2J\xf2`b\xe5<\xd5\xbc8\x01\xd6`\xdaMfilenodeheads\x80DnameKfilehistory
+  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>     79\r\n
+  s>     q\x00\x00\x01\x00\x02\x000
+  s>     \xa4HlinknodeT\x15_\xcd\xfdBs\xeb\xeb\\.T\xd1\xc8q\x1f\xfd\xc2\x993\xabDnodeT6\xb6\x17\xab\xfb\x82\x98\x83\xcd\xd6\x07g\xd1e\xeaEM\xd8\x17&Fp1nodeT+N\xb0s\x19\xbf\xa0w\xa4\n
+  s>     /\x04\x916Y\xae\xf0\xdaB\xdaFp2nodeT\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00
+  s>     \r\n
+  received frame(size=113; request=1; stream=2; streamflags=; type=command-response; flags=)
+  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: [{b'status': b'ok'}, {b'linknode': b'\x15_\xcd\xfdBs\xeb\xeb\\.T\xd1\xc8q\x1f\xfd\xc2\x993\xab', b'node': b'6\xb6\x17\xab\xfb\x82\x98\x83\xcd\xd6\x07g\xd1e\xeaEM\xd8\x17&', b'p1node': b'+N\xb0s\x19\xbf\xa0w\xa4\n/\x04\x916Y\xae\xf0\xdaB\xda', b'p2node': b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'}]
+
+  $ cat error.log