B4X

OpenAI (ChatGPT) Create Image

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Show how to send a POST to create an image. Gets the JSON response with URLs and then downloads images to files. B4X

Dim success As Boolean = False

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

Dim http As ChilkatHttp
http.Initialize("http")

'  Implements the following CURL command:

'  curl https://api.openai.com/v1/images/generations \
'    -H "Content-Type: application/json" \
'    -H "Authorization: Bearer $OPENAI_API_KEY" \
'    -d '{
'      "prompt": "A cute baby sea otter",
'      "n": 2,
'      "size": "1024x1024"
'    }'

'  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.

'  {
'    "prompt": "A cute baby sea otter",
'    "n": 2,
'    "size": "1024x1024"
'  }

Dim json As ChilkatJsonObject
json.Initialize
json.UpdateString("prompt", "A cute baby sea otter")
json.UpdateInt("n", 2)
json.UpdateString("size", "1024x1024")

'  Adds the "Authorization: Bearer $OPENAI_API_KEY" header.
'  This is NOT a real key.  Change the "sk-vi...." to your own key.
http.AuthToken = "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"

Dim resp As ChilkatHttpResponse
resp.Initialize
success = http.HttpJson("POST", "https://api.openai.com/v1/images/generations", json, "application/json", resp)
If success = False Then
    Log(http.LastErrorText)
    Return
End If


Dim sbResponseBody As ChilkatStringBuilder
sbResponseBody.Initialize
resp.GetBodySb(sbResponseBody)

Dim jResp As ChilkatJsonObject
jResp.Initialize
jResp.LoadSb(sbResponseBody)
jResp.EmitCompact = False

Log("Response Body:")
Log(jResp.Emit)

Dim respStatusCode As Int = resp.StatusCode
Log("Response Status Code = " & respStatusCode)
If respStatusCode >= 400 Then
    Log("Response Header:")
    Log(resp.Header)
    Log("Failed.")
    Return
End If


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

'  {
'    "created": 1589478378,
'    "data": [
'      {
'        "url": "https://..."
'      },
'      {
'        "url": "https://..."
'      }
'    ]
'  }

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

Dim url As String
Dim sbLocalFilePath As ChilkatStringBuilder
sbLocalFilePath.Initialize

'  Download each image..
http.ClearHeaders
http.AuthToken = ""

Dim created As Int = jResp.IntOf("created")
Dim i As Int = 0
Dim count_i As Int = jResp.SizeOfArray("data")
Do While i < count_i
    jResp.I = i
    url = jResp.StringOf("data[i].url")

    sbLocalFilePath.SetString("c:/aaworkarea/image_")
    sbLocalFilePath.AppendInt(i + 1)
    sbLocalFilePath.Append(".png")

    success = http.Download(url, sbLocalFilePath.GetAsString)
    If success = False Then
        Log(http.LastErrorText)
        Return
    End If


    i = i + 1
Loop