✨ feat(custom.py): add new custom component 'YourComponent' to the project

This commit adds a new file 'custom.py' under the 'src/backend/langflow/components/custom_components' directory. The file contains the implementation of a custom component called 'YourComponent'.

The 'YourComponent' class extends the 'CustomComponent' class from the 'langflow' library. It has a display name of "Custom Component" and a description of "My description".

The component has a 'build_config' method that returns a configuration object with a single property 'url'. The 'url' property is multiline and required.

The 'build' method of the component takes in a 'url' string, a 'llm' object of type 'BaseLLM', and a 'prompt' object of type 'PromptTemplate'. It makes a GET request to the provided 'url', runs the response text through an 'LLMChain' with the given 'llm' and 'prompt', and returns a 'Document' object with the resulting page content.

src/backend/langflow/components/custom_components/custom.py

@@ -0,0 +1,21 @@
+from langflow import CustomComponent
+
+from langchain.llms.base import BaseLLM
+from langchain.chains import LLMChain
+from langchain import PromptTemplate
+from langchain.schema import Document
+
+import requests
+
+class YourComponent(CustomComponent):
+    display_name: str = "Custom Component"
+    description: str = "My description"
+
+    def build_config(self):
+        return { "url": { "multiline": True, "required": True } }
+
+    def build(self, url: str, llm: BaseLLM, prompt: PromptTemplate) -> Document:
+        response = requests.get(url)
+        chain = LLMChain(llm=llm, prompt=prompt)
+        result = chain.run(response.text[:300])
+        return Document(page_content=str(result))