Objective-C

OpenAI (ChatGPT) Upload JSON String

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Demonstrate how to upload a file (from a JSON string) to a OpenAI user's organization. Objective-C

#import <CkoHttp.h>
#import <CkoHttpRequest.h>
#import <CkoStringBuilder.h>
#import <CkoHttpResponse.h>
#import <CkoJsonObject.h>
#import <NSString.h>

BOOL success = NO;

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

CkoHttp *http = [[CkoHttp alloc] init];

// Implements the following CURL command:

// curl https://api.openai.com/v1/files \
//   -H "Authorization: Bearer $OPENAI_API_KEY" \
//   -F purpose="fine-tune" \
//   -F file="@mydata.jsonl"

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

CkoHttpRequest *req = [[CkoHttpRequest alloc] init];
req.HttpVerb = @"POST";
req.Path = @"/v1/files";
req.ContentType = @"multipart/form-data";
[req AddParam: @"purpose" value: @"fine-tune"];

// { "prompt": "aa", "completion": "bb" }
// { "prompt": "cc", "completion": "dd" }
CkoStringBuilder *sbJsonData = [[CkoStringBuilder alloc] init];
[sbJsonData AppendLine: @"{ \"prompt\": \"aa\", \"completion\": \"bb\" }" crlf: YES];
[sbJsonData AppendLine: @"{ \"prompt\": \"cc\", \"completion\": \"dd\" }" crlf: YES];
success = [req AddStringForUpload2: @"file" filename: @"mydata2.jsonl" strData: [sbJsonData GetAsString] charset: @"utf-8" contentType: @"application/octet-stream"];

// This is NOT a real key.  Change the "sk-vi...." to your own key.
[req AddHeader: @"Authorization" value: @"Bearer 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"];
[req AddHeader: @"Expect" value: @"100-continue"];

CkoHttpResponse *resp = [[CkoHttpResponse alloc] init];
success = [http HttpSReq: @"api.openai.com" port: [NSNumber numberWithInt: 443] ssl: YES request: req response: resp];
if (success == NO) {
    NSLog(@"%@",http.LastErrorText);
    return;
}

CkoStringBuilder *sbResponseBody = [[CkoStringBuilder alloc] init];
[resp GetBodySb: sbResponseBody];

CkoJsonObject *jResp = [[CkoJsonObject alloc] init];
[jResp LoadSb: sbResponseBody];
jResp.EmitCompact = NO;

NSLog(@"%@",@"Response Body:");
NSLog(@"%@",[jResp Emit]);

int respStatusCode = [resp.StatusCode intValue];
NSLog(@"%@%d",@"Response Status Code = ",respStatusCode);
if (respStatusCode >= 400) {
    NSLog(@"%@",@"Response Header:");
    NSLog(@"%@",resp.Header);
    NSLog(@"%@",@"Failed.");
    return;
}

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

// {
//   "id": "file-XjGxS3KTG0uNmNOK362iJua3",
//   "object": "file",
//   "bytes": 140,
//   "created_at": 1613779121,
//   "filename": "mydata2.jsonl",
//   "purpose": "fine-tune"
// }

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

NSString *id = [jResp StringOf: @"id"];
NSString *v_object = [jResp StringOf: @"object"];
int v_bytes = [[jResp IntOf: @"bytes"] intValue];
int created_at = [[jResp IntOf: @"created_at"] intValue];
NSString *filename = [jResp StringOf: @"filename"];
NSString *purpose = [jResp StringOf: @"purpose"];