PureBasic

OpenAI (ChatGPT) Create Chat Completion

See more OpenAI ChatGPT Examples

Shows how to create a model response for a given chat conversation. PureBasic

IncludeFile "CkHttpResponse.pb"
IncludeFile "CkHttp.pb"
IncludeFile "CkStringBuilder.pb"
IncludeFile "CkJsonObject.pb"

Procedure ChilkatExample()

    success.i = 0

    ; This example assumes the Chilkat API to have been previously unlocked.
    ; See Global Unlock Sample for sample code.

    http.i = CkHttp::ckCreate()
    If http.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    ; Implements the following CURL command:

    ; curl https://api.openai.com/v1/chat/completions \
    ;   -H "Content-Type: application/json" \
    ;   -H "Authorization: Bearer $OPENAI_API_KEY" \
    ;   -d '{
    ;     "model": "gpt-3.5-turbo",
    ;     "messages": [{"role": "user", "content": "Hello!"}]
    ;   }'

    ; Use the following online tool to generate HTTP code from a CURL command
    ; Convert a cURL Command to HTTP Source Code

    ; Use this online tool to generate code from sample JSON:
    ; Generate Code to Create JSON

    ; The following JSON is sent in the request body.

    ; {
    ;   "model": "gpt-3.5-turbo",
    ;   "messages": [
    ;     {
    ;       "role": "user",
    ;       "content": "Hello!"
    ;     }
    ;   ]
    ; }

    json.i = CkJsonObject::ckCreate()
    If json.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkJsonObject::ckUpdateString(json,"model","gpt-3.5-turbo")
    CkJsonObject::ckUpdateString(json,"messages[0].role","user")
    CkJsonObject::ckUpdateString(json,"messages[0].content","Hello!")

    ; Adds the "Authorization: Bearer $OPENAI_API_KEY" header.
    ; This is NOT a real key.  Change the "sk-vi...." to your own key.
    CkHttp::setCkAuthToken(http, "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")
    CkHttp::ckSetRequestHeader(http,"Content-Type","application/json")

    resp.i = CkHttpResponse::ckCreate()
    If resp.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success = CkHttp::ckHttpJson(http,"POST","https://api.openai.com/v1/chat/completions",json,"application/json",resp)
    If success = 0
        Debug CkHttp::ckLastErrorText(http)
        CkHttp::ckDispose(http)
        CkJsonObject::ckDispose(json)
        CkHttpResponse::ckDispose(resp)
        ProcedureReturn
    EndIf

    sbResponseBody.i = CkStringBuilder::ckCreate()
    If sbResponseBody.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkHttpResponse::ckGetBodySb(resp,sbResponseBody)

    jResp.i = CkJsonObject::ckCreate()
    If jResp.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkJsonObject::ckLoadSb(jResp,sbResponseBody)
    CkJsonObject::setCkEmitCompact(jResp, 0)

    Debug "Response Body:"
    Debug CkJsonObject::ckEmit(jResp)

    respStatusCode.i = CkHttpResponse::ckStatusCode(resp)
    Debug "Response Status Code = " + Str(respStatusCode)
    If respStatusCode >= 400
        Debug "Response Header:"
        Debug CkHttpResponse::ckHeader(resp)
        Debug "Failed."
        CkHttp::ckDispose(http)
        CkJsonObject::ckDispose(json)
        CkHttpResponse::ckDispose(resp)
        CkStringBuilder::ckDispose(sbResponseBody)
        CkJsonObject::ckDispose(jResp)
        ProcedureReturn
    EndIf

    ; Sample JSON response:
    ; (Sample code for parsing the JSON response is shown below)

    ; {
    ;   "id": "chatcmpl-123",
    ;   "object": "chat.completion",
    ;   "created": 1677652288,
    ;   "choices": [
    ;     {
    ;       "index": 0,
    ;       "message": {
    ;         "role": "assistant",
    ;         "content": "\n\nHello there, how may I assist you today?"
    ;       },
    ;       "finish_reason": "stop"
    ;     }
    ;   ],
    ;   "usage": {
    ;     "prompt_tokens": 9,
    ;     "completion_tokens": 12,
    ;     "total_tokens": 21
    ;   }
    ; }

    ; Sample code for parsing the JSON response...
    ; Use the following online tool to generate parsing code from sample JSON:
    ; Generate Parsing Code from JSON

    index.i
    Role.s
    Content.s
    finish_reason.s

    id.s = CkJsonObject::ckStringOf(jResp,"id")
    v_object.s = CkJsonObject::ckStringOf(jResp,"object")
    created.i = CkJsonObject::ckIntOf(jResp,"created")
    Prompt_tokens.i = CkJsonObject::ckIntOf(jResp,"usage.prompt_tokens")
    Completion_tokens.i = CkJsonObject::ckIntOf(jResp,"usage.completion_tokens")
    Total_tokens.i = CkJsonObject::ckIntOf(jResp,"usage.total_tokens")
    i.i = 0
    count_i.i = CkJsonObject::ckSizeOfArray(jResp,"choices")
    While i < count_i
        CkJsonObject::setCkI(jResp, i)
        index = CkJsonObject::ckIntOf(jResp,"choices[i].index")
        Role = CkJsonObject::ckStringOf(jResp,"choices[i].message.role")
        Content = CkJsonObject::ckStringOf(jResp,"choices[i].message.content")
        finish_reason = CkJsonObject::ckStringOf(jResp,"choices[i].finish_reason")
        i = i + 1
    Wend


    CkHttp::ckDispose(http)
    CkJsonObject::ckDispose(json)
    CkHttpResponse::ckDispose(resp)
    CkStringBuilder::ckDispose(sbResponseBody)
    CkJsonObject::ckDispose(jResp)


    ProcedureReturn
EndProcedure