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Merge pull request #21 from sharelatex/ja-check-for-null-bytes

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Check for null bytes before writing to redis and log hashes when writing
This commit is contained in:
James Allen 2017-02-27 10:26:35 +01:00 committed by GitHub
commit 5a4884cccf
3 changed files with 68 additions and 22 deletions
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14
services/document-updater/app/coffee/RedisManager.coffee
View file

@ -31,6 +31,10 @@ module.exports = RedisManager =
timer.done()
_callback(error)
docLines = JSON.stringify(docLines)
if docLines.indexOf("\u0000") != -1
error = new Error("null bytes found in doc lines")
logger.error err: error, doc_id: doc_id, docLines: docLines, error.message
return callback(error)
docHash = RedisManager._computeHash(docLines)
logger.log project_id:project_id, doc_id:doc_id, version: version, hash:docHash, "putting doc in redis"
ranges = RedisManager._serializeRanges(ranges)
@ -148,10 +152,18 @@ module.exports = RedisManager =
error = new Error("Version mismatch. '#{doc_id}' is corrupted.")
logger.error {err: error, doc_id, currentVersion, newVersion, opsLength: appliedOps.length}, "version mismatch"
return callback(error)
jsonOps = appliedOps.map (op) -> JSON.stringify op
multi = rclient.multi()
newDocLines = JSON.stringify(docLines)
if newDocLines.indexOf("\u0000") != -1
error = new Error("null bytes found in doc lines")
logger.error err: error, doc_id: doc_id, newDocLines: newDocLines, error.message
return callback(error)
newHash = RedisManager._computeHash(newDocLines)
logger.log doc_id: doc_id, version: newVersion, hash: newHash, "updating doc in redis"
multi = rclient.multi()
multi.eval setScript, 1, keys.docLines(doc_id:doc_id), newDocLines
multi.set keys.docVersion(doc_id:doc_id), newVersion
multi.set keys.docHash(doc_id:doc_id), newHash

1
services/document-updater/app/coffee/UpdateManager.coffee
View file

@ -61,7 +61,6 @@ module.exports = UpdateManager =
return callback(error) if error?
RangesManager.applyUpdate project_id, doc_id, ranges, appliedOps, (error, new_ranges) ->
return callback(error) if error?
logger.log doc_id: doc_id, version: version, "updating doc in redis"
RedisManager.updateDocument doc_id, updatedDocLines, version, appliedOps, new_ranges, (error) ->
return callback(error) if error?
HistoryManager.pushUncompressedHistoryOps project_id, doc_id, appliedOps, callback

75
services/document-updater/test/unit/coffee/RedisManager/RedisManagerTests.coffee
View file

@ -12,26 +12,30 @@ describe "RedisManager", ->
auth: () ->
exec: sinon.stub()
@rclient.multi = () => @rclient
@RedisManager = SandboxedModule.require modulePath, requires:
"./RedisBackend":
createClient: () => @rclient
"./RedisKeyBuilder":
blockingKey: ({doc_id}) -> "Blocking:#{doc_id}"
docLines: ({doc_id}) -> "doclines:#{doc_id}"
docOps: ({doc_id}) -> "DocOps:#{doc_id}"
docVersion: ({doc_id}) -> "DocVersion:#{doc_id}"
docHash: ({doc_id}) -> "DocHash:#{doc_id}"
projectKey: ({doc_id}) -> "ProjectId:#{doc_id}"
pendingUpdates: ({doc_id}) -> "PendingUpdates:#{doc_id}"
docsInProject: ({project_id}) -> "DocsIn:#{project_id}"
ranges: ({doc_id}) -> "Ranges:#{doc_id}"
"logger-sharelatex": @logger = { error: sinon.stub(), log: sinon.stub(), warn: sinon.stub() }
"settings-sharelatex": {documentupdater: {logHashErrors: {write:true, read:true}}}
"./Metrics": @metrics =
inc: sinon.stub()
Timer: class Timer
done: () ->
"./Errors": Errors
@RedisManager = SandboxedModule.require modulePath,
requires:
"./RedisBackend":
createClient: () => @rclient
"./RedisKeyBuilder":
blockingKey: ({doc_id}) -> "Blocking:#{doc_id}"
docLines: ({doc_id}) -> "doclines:#{doc_id}"
docOps: ({doc_id}) -> "DocOps:#{doc_id}"
docVersion: ({doc_id}) -> "DocVersion:#{doc_id}"
docHash: ({doc_id}) -> "DocHash:#{doc_id}"
projectKey: ({doc_id}) -> "ProjectId:#{doc_id}"
pendingUpdates: ({doc_id}) -> "PendingUpdates:#{doc_id}"
docsInProject: ({project_id}) -> "DocsIn:#{project_id}"
ranges: ({doc_id}) -> "Ranges:#{doc_id}"
"logger-sharelatex": @logger = { error: sinon.stub(), log: sinon.stub(), warn: sinon.stub() }
"settings-sharelatex": {documentupdater: {logHashErrors: {write:true, read:true}}}
"./Metrics": @metrics =
inc: sinon.stub()
Timer: class Timer
done: () ->
"./Errors": Errors
globals:
JSON: @JSON = JSON
@doc_id = "doc-id-123"
@project_id = "project-id-123"
@callback = sinon.stub()
@ -318,6 +322,22 @@ describe "RedisManager", ->
it "should call the callback", ->
@callback.called.should.equal true
describe "with null bytes in the serialized doc lines", ->
beforeEach ->
@RedisManager.getDocVersion.withArgs(@doc_id).yields(null, @version - @ops.length)
@_stringify = JSON.stringify
@JSON.stringify = () -> return '["bad bytes! \u0000 <- here"]'
@RedisManager.updateDocument @doc_id, @lines, @version, @ops, @ranges, @callback
afterEach ->
@JSON.stringify = @_stringify
it "should log an error", ->
@logger.error.called.should.equal true
it "should call the callback with an error", ->
@callback.calledWith(new Error("null bytes found in doc lines")).should.equal true
describe "putDocInMemory", ->
beforeEach ->
@rclient.set = sinon.stub()
@ -391,6 +411,21 @@ describe "RedisManager", ->
@logger.error.calledWith()
.should.equal true
describe "with null bytes in the serialized doc lines", ->
beforeEach ->
@_stringify = JSON.stringify
@JSON.stringify = () -> return '["bad bytes! \u0000 <- here"]'
@RedisManager.putDocInMemory @project_id, @doc_id, @lines, @version, @ranges, @callback
afterEach ->
@JSON.stringify = @_stringify
it "should log an error", ->
@logger.error.called.should.equal true
it "should call the callback with an error", ->
@callback.calledWith(new Error("null bytes found in doc lines")).should.equal true
describe "removeDocFromMemory", ->
beforeEach (done) ->
@rclient.del = sinon.stub()