Thanks for the quick reply. My application essential builds the protobuf object from the incoming wire string. It is literally something like MyProtobufObject.fromString(...):
The POST payload typically looks something like this b'\n\xb1\t\n$9c4a0f64-791e-4286-b4a3-ba862e4b31bc\x12\xa4\x01\n\x011\x12\x1f\x08\xac\x02\x10\xfa\x010\x010\x020\x060\x070\n0\x0b0\x0e\xc2>\x08\x1a\x06\x08\xac\x02\x10\xfa\x01Zr\x08\x00\x12\x1a\n' Notice the single slashes. I am able to use postman to post the exact body content, which makes it to my backend sever intact and unaltered--but maybe postman is just too kind. However, when I am using JMeter, and now Apache Bench, the content that is being sent not only has the added b'' wrapper, but also the backslashes are backslashed again--which causes my issue. I've tried the file upload approach but am still getting this bad behavior. It's the backslashes that are getting me--as I could pass only \n\xb1\t\n$9c4a0f64-791e-4286-b4a3-ba862e4b31bc\x12\xa4\x01\n\x011\x12\x1f\x08\xac\x02\x10\xfa\x010\x010\x020\x060\x070\n0\x0b0\x0e\xc2>\x08\x1a\x06\x08\xac\x02\x10\xfa\x01Zr\x08\x00\x12\x1a\n, and have that added wrapper of b"" work in my favor, but getting the following isn't good: b'\\n\\xb1\\t\\n$9c4a0f64-791e-4286-b4a3-ba862e4b31bc\\x12\\xa4\\x01\\n\\x011\\x12\\x1f\\x08\\xac\\x02\\x10\\xfa\\x010\\x010\\x020\\x060\\x070\\n0\\x0b0\\x0e\\xc2>\\x08\\x1a\\x06\\x08\\xac\\x02\\x10\\xfa\\x01Zr\\x08\\x00\\x12\\x1a\\n' On Wed, Jun 20, 2018 at 6:15 PM, David Luu <manga...@gmail.com> wrote: > I'm unaware of details of protobuf particularly with HTTP, but if you were > to make an HTTP request using a REST/API client/tool (or custom scripting) > or a browser based REST client, what would it actually look like for what > you send, and/or rather what does the raw data look like when you sniff it > say with an HTTP proxy like fiddler/charles. > > I'm just wondering if jmeter is the only tool with the issue or other REST > clients have it too or not. > > How are you POSTing the data exactly? Pasting the value in the GUI field in > the sampler? Or via a file upload/POST? If the former, I suggest you try > the latter of POSTing/uploading an empty protobuf encoded file with jmeter > and see if that works for you. And be sure the file is generated/encoded > using protobuf tooling (or scripts), not some text editor. Because protobuf > is a binary format as I recall, denoting it as b'' might just be treated as > plain text by jmeter regardless of the Content-Type (unless jmeter was > smart to key off that header value). A library that deals with protobuf or > some languages like python might understand b'' to be empty binary data, > but other tools may not and think that just a literal string value. Using > true protobuf encoded file (or dumping that value out) will ensure you get > the right encoding. > > If the GUI based HTTP sampler isn't ideal or working, you could try the > scripting based samplers using Java, Groovy, Javascript together with > protobuf and HTTP libraries for those languages to do what you need. > > On Wed, Jun 20, 2018 at 5:34 PM, Britt Cagnina <tyr...@gmail.com> wrote: > > > I have a Sampler HTTP Request setup with the body as: > > > > b'' > > > > This is a simple empty protobuf object, but JMeter is actually sending > some > > wrapped version of this: > > > > b"b''" > > > > I have used Content-Type to be both application/protobuf and > > application/octet-stream. > > > > Is there a way to get JMeter to post EXACTLY what I give it? > > > > > > I have an open stack overflow issue for better formatting: > > https://stackoverflow.com/questions/50957492/jmeter-not- > > posting-binary-data-correctly > > > > Thanks, > > Britt > > >
