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https://github.com/iitzco/tfserve
Serve TF models simple and easy as an HTTP API
https://github.com/iitzco/tfserve
artificial-intelligence deep-learning http-api http-server neural-network tensorflow tensorflow-models tensorflow-serving
Last synced: about 1 month ago
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Serve TF models simple and easy as an HTTP API
- Host: GitHub
- URL: https://github.com/iitzco/tfserve
- Owner: iitzco
- License: mit
- Created: 2018-09-04T14:57:57.000Z (about 6 years ago)
- Default Branch: master
- Last Pushed: 2018-10-29T16:04:23.000Z (about 6 years ago)
- Last Synced: 2024-09-30T17:05:13.986Z (about 1 month ago)
- Topics: artificial-intelligence, deep-learning, http-api, http-server, neural-network, tensorflow, tensorflow-models, tensorflow-serving
- Language: Python
- Size: 3.01 MB
- Stars: 35
- Watchers: 2
- Forks: 10
- Open Issues: 2
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# TFServe
[](https://pepy.tech/project/tfserve) [](https://badge.fury.io/py/tfserve)
TFServe is a framework designed to serve tensorflow models in a simple and easy way as an HTTP API server. It's built on top of [Werkzeug](http://werkzeug.pocoo.org/).
## How to install
```bash
$ pip install tfserve
```
After installing `tfserve`, install either `tensorflow` of `tensorflow-gpu` (the latter if you have GPU available).
```bash
$ pip install tensorflow
```
or
```bash
$ pip install tensorflow-gpu
```
## How to use
### Python API
You will need 5 parts:
1. **Model**: it can be a `.pb` file or a model directory containing ckpt files.
2. **Input tensor names**: name of the input tensors of the graph.
3. **Output tensor names**: name of the output tensors of the graph.
4. **`encode`**: python function that receives the request body data and outputs a `dict` mapping input tensor names to input numpy values.
5. **`decode`**: python function that receives a `dict` mapping output tensor names to output numpy values and returns the HTTP response.
Follow the example to learn how to combine these parts...
#### Example
Deploy image classification service that receives a binary jpg image and returns the class of the object found in the image alongside it's probability.
```python
# 1. Model: trained mobilenet on ImageNet that can be downloaded from
# https://storage.googleapis.com/mobilenet_v2/checkpoints/mobilenet_v2_1.4_224.tgz
MODEL_PATH = "mobilenet_v2_1.4_224/mobilenet_v2_1.4_224_frozen.pb"
# 2. Input tensor names:
INPUT_TENSORS = ["import/input:0"]
# 3. Output tensor names:
OUTPUT_TENSORS = ["import/MobilenetV2/Predictions/Softmax:0"]
# 4. encode function: Receives raw jpg image as request data. Returns dict
# mappint import/input:0 to numpy value.
def encode(request_data):
with tempfile.NamedTemporaryFile(mode="wb", suffix=".jpg") as f:
f.write(request_data)
# Model receives 224x224 normalized RGB image.
img = Image.open(f.name).resize((224, 224))
img = np.asarray(img) / 255.
return {INPUT_TENSORS[0]: img}
# 5. decode function: Receives `dict` mapping import/MobilenetV2/Predictions/Softmax:0 to
# numpy value and builds dict with for json response.
def decode(outputs):
p = outputs[OUTPUT_TENSORS[0]] # 1001 vector with probabilities for each class.
index = np.argmax(p)
return {"class": index_to_class_map[index-1], "prob": float(p[index])}
```
That's it! Now create TFServeApp object and run it!
```python
app = TFServeApp(MODEL_PATH, INPUT_TENSORS, OUTPUT_TENSORS, encode, decode)
app.run('127.0.0.1', 5000) # Host and port where the server will be running
```
See `client.py` for full example.
#### How to consume server
> The server supports only `POST` method to `/` with the input information as part of the request body.
The input will be proccessed in the encode function to produce the feed_dict object that will be passed to the graph. The graph output will be processed in the decode function and the server will return whatever the decode function returns.
### CLI
`tfserve` also provides a CLI program with built-in encode/decode handlers:
```bash
tfserve -m PATH [-i INPUTS] [-o OUTPUTS] [-h HANDLER] [-b] [-H HOST] [-p PORT]
-m PATH, --model PATH
path to pb file or directory containing checkpoint
-i INPUTS, --inputs INPUTS
a comma separated list of input tensors
-o OUTPUTS, --outputs OUTPUTS
a comma separated list of output tensors
-h HANDLER, --handler HANDLER
encode/decode handler (deault is 'json')
-b, --batch process multiple inputs (default is to process
one input per request)
-H HOST, --host HOST host interface to bind to (0.0.0.0)
-p PORT, --port PORT port to listen on (5000)
```
#### Example
```bash
$ tfserve -m models/graph.pb -i x:0 -o out:0 -h json -H localhost
```
Run `tfserve` with `models/graph.pb` model that takes as input the tensor with name `x:0` (dimesion: [?,5]) and outputs a tensor named `out:0`. The server will run on http://localhost:5000/ and will receive `POST` requests to `/`.
By using the **json handler**, you can provide the input data as a `json` object in the request body:
```json
{
"x:0": [1,1,3,4,5]
}
```
You will receive a `json` output object as:
```json
{
"out:0": 0.48
}
```
#### More information about CLI
Run:
```bash
$ tfserve --help
```
## Help
* **What if I don't know the tensor names?**
> You can use `tfserve.helper.estimate_io_tensors(model_path)` function to get a list of possible input/output tensor names. Also, you can use the CLI by running: `tfserve -m [model_path] --help-model`
* **What if I want to run multiple inferences at the same time?**
> You can use `batch=True` when building tfserve.TFServeApp. You will then need to handle the batch dimension yourself in the `encode` and `decode` function.
> Also, if using the CLI, just add the `--batch` flag.
## Limitation
> It only works with one-to-one models. That is, models that need to run the graph only once to get the inference.
> Other architectures of inference will be supported soon. Help is appreciated!