Status code 400 (bad request) if more than 1000 IDs are posted to the chemical annotation service

[erikyao]

API involved:

• URL: http://mychem.info/v1/chem
• HTTP method: POST

Per the document:

ids: Required. Accept multiple chemical ids separated by comma, e.g., “ids=SDUQYLNIPVEERB-QPPQHZFASA-N,SESFRYSPDFLNCH-UHFFFAOYSA-N,SHGAZHPCJJPHSC-ZVCIMWCZSA-N”. Note that currently we only take the input ids up to 1000 maximum, the rest will be omitted.

However if I have more than 1000 IDs, I'll receive a 400 bad request from server.

MWE:

import requests

drugbank_ids = [str(i) for i in range(1001)]  # 1001 fake IDs

url = 'http://mychem.info/v1/chem'
data = {"ids": ",".join(drugbank_ids)}
response = requests.post(url, data=data)

# raise an HTTPError if the HTTP request returned an unsuccessful status code 
response.raise_for_status()

# HTTPError: 400 Client Error: Bad Request for url: http://mychem.info/v1/chem