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New http-request agent (LangStream#537)
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# Http Request processor | ||
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This sample application shows how to execute the http request processor. | ||
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## Deploy the LangStream application | ||
``` | ||
./bin/langstream apps deploy test -app examples/applications/http-request-processor -i examples/instances/kafka-kubernetes.yaml | ||
``` | ||
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## Chat | ||
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Since the application opens a gateway, we can use the gateway API to send and consume messages using the use gateway `chat` feature: | ||
``` | ||
./bin/langstream gateway chat test -g chat | ||
``` | ||
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Ask about a city and you will get the timezone. | ||
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examples/applications/http-request-processor/gateways.yaml
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# | ||
# | ||
# Copyright DataStax, Inc. | ||
# | ||
# Licensed under the Apache License, Version 2.0 (the "License"); | ||
# you may not use this file except in compliance with the License. | ||
# You may obtain a copy of the License at | ||
# | ||
# http://www.apache.org/licenses/LICENSE-2.0 | ||
# | ||
# Unless required by applicable law or agreed to in writing, software | ||
# distributed under the License is distributed on an "AS IS" BASIS, | ||
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
# See the License for the specific language governing permissions and | ||
# limitations under the License. | ||
# | ||
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gateways: | ||
- id: chat | ||
type: chat | ||
chat-options: | ||
answers-topic: output-topic | ||
questions-topic: input-topic |
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examples/applications/http-request-processor/pipeline.yaml
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# | ||
# Copyright DataStax, Inc. | ||
# | ||
# Licensed under the Apache License, Version 2.0 (the "License"); | ||
# you may not use this file except in compliance with the License. | ||
# You may obtain a copy of the License at | ||
# | ||
# http://www.apache.org/licenses/LICENSE-2.0 | ||
# | ||
# Unless required by applicable law or agreed to in writing, software | ||
# distributed under the License is distributed on an "AS IS" BASIS, | ||
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
# See the License for the specific language governing permissions and | ||
# limitations under the License. | ||
# | ||
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topics: | ||
- name: "input-topic" | ||
creation-mode: create-if-not-exists | ||
- name: "output-topic" | ||
creation-mode: create-if-not-exists | ||
pipeline: | ||
- name: "convert-to-json" | ||
type: "document-to-json" | ||
input: "input-topic" | ||
configuration: | ||
text-field: "city" | ||
- name: "Get timezone info from geocoding API" | ||
type: "http-request" | ||
configuration: | ||
url: "https://geocoding-api.open-meteo.com/v1/search" | ||
query-string: | ||
name: "{{{ value.city }}}" | ||
count: "1" | ||
format: "json" | ||
output-field: "value.response" | ||
method: "GET" | ||
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- name: "Extract timezone" | ||
type: "compute" | ||
configuration: | ||
fields: | ||
- name: "value.timezone" | ||
expression: "value.response.results[0].timezone" | ||
type: STRING | ||
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- name: "Extract timezone" | ||
type: "drop-fields" | ||
output: "output-topic" | ||
configuration: | ||
fields: | ||
- response |
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<?xml version="1.0" encoding="UTF-8"?> | ||
<!-- | ||
Copyright DataStax, Inc. | ||
Licensed under the Apache License, Version 2.0 (the "License"); | ||
you may not use this file except in compliance with the License. | ||
You may obtain a copy of the License at | ||
http://www.apache.org/licenses/LICENSE-2.0 | ||
Unless required by applicable law or agreed to in writing, software | ||
distributed under the License is distributed on an "AS IS" BASIS, | ||
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
See the License for the specific language governing permissions and | ||
limitations under the License. | ||
--> | ||
<project xmlns="http://maven.apache.org/POM/4.0.0" | ||
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" | ||
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> | ||
<parent> | ||
<artifactId>langstream-agents</artifactId> | ||
<groupId>ai.langstream</groupId> | ||
<version>0.1.1-SNAPSHOT</version> | ||
</parent> | ||
<modelVersion>4.0.0</modelVersion> | ||
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<artifactId>langstream-agent-http-request</artifactId> | ||
<dependencies> | ||
<dependency> | ||
<groupId>${project.groupId}</groupId> | ||
<artifactId>langstream-api</artifactId> | ||
<version>${project.version}</version> | ||
<scope>provided</scope> | ||
</dependency> | ||
<dependency> | ||
<groupId>${project.groupId}</groupId> | ||
<artifactId>langstream-agents-commons</artifactId> | ||
<version>${project.version}</version> | ||
</dependency> | ||
<dependency> | ||
<groupId>org.projectlombok</groupId> | ||
<artifactId>lombok</artifactId> | ||
<scope>provided</scope> | ||
</dependency> | ||
<dependency> | ||
<groupId>org.slf4j</groupId> | ||
<artifactId>slf4j-api</artifactId> | ||
</dependency> | ||
<dependency> | ||
<groupId>com.samskivert</groupId> | ||
<artifactId>jmustache</artifactId> | ||
</dependency> | ||
<dependency> | ||
<groupId>ch.qos.logback</groupId> | ||
<artifactId>logback-core</artifactId> | ||
<scope>test</scope> | ||
</dependency> | ||
<dependency> | ||
<groupId>ch.qos.logback</groupId> | ||
<artifactId>logback-classic</artifactId> | ||
<scope>test</scope> | ||
</dependency> | ||
<dependency> | ||
<groupId>org.junit.jupiter</groupId> | ||
<artifactId>junit-jupiter</artifactId> | ||
<scope>test</scope> | ||
</dependency> | ||
</dependencies> | ||
<build> | ||
<plugins> | ||
<plugin> | ||
<groupId>org.apache.nifi</groupId> | ||
<artifactId>nifi-nar-maven-plugin</artifactId> | ||
<extensions>true</extensions> | ||
<configuration> | ||
<classifier>nar</classifier> | ||
</configuration> | ||
<executions> | ||
<execution> | ||
<id>default-nar</id> | ||
<phase>package</phase> | ||
<goals> | ||
<goal>nar</goal> | ||
</goals> | ||
</execution> | ||
</executions> | ||
</plugin> | ||
</plugins> | ||
</build> | ||
</project> |
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