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i.lucas avatar image
5 ●1 ●2 ●5

Error 202 with TickHistoryTimeAndSalesExtractionRequest

Hi,

I don't understand why I get a 202 error with the following code:


body = json.dumps({
  "ExtractionRequest": {
    "@odata.type": "#ThomsonReuters.Dss.Api.Extractions.ExtractionRequests.TickHistoryTimeAndSalesExtractionRequest",
    "ContentFieldNames": list_trade_fields,
    "IdentifierList": {
      "@odata.type": "#ThomsonReuters.Dss.Api.Extractions.ExtractionRequests.InstrumentIdentifierList",
      "InstrumentIdentifiers": [
        { "Identifier": "SOLB.TG", "IdentifierType": "Ric" }
      ],
      "ValidationOptions": {
        "AllowHistoricalInstruments": True,
        "AllowInactiveInstruments": True,
        "AllowOpenAccessInstruments": False
      },
      "UseUserPreferencesForValidationOptions": False
    },
    "Condition": {
        "ReportDateRangeType" : "Range",
        "QueryStartDate": "2019-08-01T00:00:00.000Z",
        "QueryEndDate": "2019-08-01T10:00:00.000Z"
        }
  }
})

url_post = "https://hosted.datascopeapi.reuters.com/RestApi/v1/Extractions/ExtractRaw"
header_post = {"Prefer": "respond-async, wait=30",
"Content-Type": "application/json",
"Authorization":myToken}
resp = requests.post(url_post,body, headers=header_post)


thank you for your help,

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1 Answer

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Gurpreet avatar image
14.7k ●39 ●12 ●18

Hello @i.lucas, HTTP 202 is not an error code:

202 Accepted
The request has been accepted for processing, but the processing has not been completed. The request might or might not eventually be acted upon, as it might be disallowed when processing actually takes place.

The server sent 202 because in your request you specified:

header_post = {"Prefer": "respond-async, wait=30",

This means that instead of keeping the client connection open for extremely long time, which can be dropped by network proxies/firewalls etc, the server waits 30 seconds and informs client that data isn't ready yet. After getting this response the client should wait and invoke another request for same URL until server responds with a HTTP200 OK message. Here is a snippet for doing that in python:

# is it a 202 (in progress)
while (resp.status_code == 202):
    print("waiting...");
    # check if the response completed yet
    URL = resp.headers['Location'];
    resp = checkStatus(URL);

print("Data available on server, fetching...");
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