TigerGraphException及REST-1101错误求助：Streamlit中运行TigerGraph代码时期望JSON却收到查询字符串

Let's tackle this error head-on: your TigerGraph API call is sending data as a query string instead of the required JSON payload, which triggers the REST-1101 error. Here are concrete fixes you can implement right away:

1. Correct Your API Request Format #

Most TigerGraph endpoints (especially for authentication and query execution) require a JSON payload. If you're using requests in your Streamlit code, swap the params= parameter with json= to ensure data is sent as JSON:

# ❌ Wrong: Sends data as query string
response = requests.post(tg_auth_url, params={"username": "your_user", "password": "your_pass"})

# ✅ Correct: Sends data as JSON payload
response = requests.post(tg_auth_url, json={"username": "your_user", "password": "your_pass"})

Don't forget to set the Content-Type: application/json header if you're not using the json= parameter—though the requests library handles this automatically when you use json=.

2. Use pyTigerGraph's Built-in Methods (If Applicable) #

If you're using the official pyTigerGraph library, lean into its built-in functions instead of writing raw API calls. The driver handles JSON formatting behind the scenes, eliminating manual errors:

from pyTigerGraph import TigerGraphConnection

# Initialize connection
conn = TigerGraphConnection(
    host="your_tg_host",
    username="your_user",
    password="your_pass",
    graphname="your_graph"
)

# Use driver's auth method instead of manual POST
auth_token = conn.getToken(conn.createSecret())

3. Debug Request Payloads to Catch Issues #

Add quick debug logs to your Streamlit app to verify exactly what's being sent to TigerGraph. This helps confirm your payload is properly formatted and headers are set:

import requests

payload = {"your_key": "your_value"}
print(f"Payload being sent: {payload}")
print(f"Request headers: {'Content-Type': 'application/json'}")

response = requests.post(your_endpoint, json=payload, headers={"Content-Type": "application/json"})

4. Fix Streamlit Form Data Handling #

If you're collecting input via Streamlit forms, avoid passing raw form data as query parameters. Format the input into a JSON object first:

import streamlit as st
import requests

with st.form("tg_connection_form"):
    username = st.text_input("TigerGraph Username")
    password = st.text_input("TigerGraph Password", type="password")
    submit_btn = st.form_submit_button("Connect")

if submit_btn:
    # Package form data into a JSON payload
    payload = {"username": username, "password": password}
    response = requests.post(tg_auth_url, json=payload)

内容的提问来源于stack exchange，提问作者Tabaxi3K