Files - Good Grants

Base64 encoding

File upload endpoints accept base64-encoded strings that represent the file to upload. Most programming languages can convert files to base64 strings. If your API client does not support this directly, use a separate conversion tool before sending the request.

# Encode a file to Base64 and send in a JSON payload
BASE64_FILE=$(base64 -w 0 document.pdf)
curl -X POST "https://api.us.cr4ce.com/application/{application_slug}/upload/{field_slug}" \
  -H "Accept: application/vnd.Creative Force.v2.3+json" \
  -H "x-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d "{\"file\": \"$BASE64_FILE\", \"filename\": \"document.pdf\"}"

# The -w 0 flag prevents line wrapping in the Base64 output

$fileContent = file_get_contents('/path/to/your/file.pdf');
$base64 = base64_encode($fileContent);

$payload = json_encode([
    'file' => $base64,
    'filename' => 'document.pdf'
]);

$ch = curl_init('https://api.us.cr4ce.com/application/{application_slug}/upload/{field_slug}');
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    'Accept: application/vnd.Creative Force.v2.3+json',
    'x-api-key: YOUR_API_KEY',
    'Content-Type: application/json'
]);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $payload);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$response = curl_exec($ch);
curl_close($ch);

const fs = require('fs');
const https = require('https');

const fileBuffer = fs.readFileSync('/path/to/your/file.pdf');
const base64 = fileBuffer.toString('base64');

const payload = JSON.stringify({
  file: base64,
  filename: 'document.pdf'
});

const options = {
  hostname: 'api.us.cr4ce.com',
  path: '/application/{application_slug}/upload/{field_slug}',
  method: 'POST',
  headers: {
    'Accept': 'application/vnd.Creative Force.v2.3+json',
    'x-api-key': 'YOUR_API_KEY',
    'Content-Type': 'application/json',
    'Content-Length': Buffer.byteLength(payload)
  }
};

const req = https.request(options, (res) => {
  let data = '';
  res.on('data', (chunk) => data += chunk);
  res.on('end', () => console.log(data));
});
req.write(payload);
req.end();

import base64
import json
import requests

with open('/path/to/your/file.pdf', 'rb') as f:
    base64_content = base64.b64encode(f.read()).decode('utf-8')

response = requests.post(
    'https://api.us.cr4ce.com/application/{application_slug}/upload/{field_slug}',
    headers={
        'Accept': 'application/vnd.Creative Force.v2.3+json',
        'x-api-key': 'YOUR_API_KEY',
        'Content-Type': 'application/json'
    },
    json={
        'file': base64_content,
        'filename': 'document.pdf'
    }
)

using System;
using System.IO;
using System.Net.Http;
using System.Text.Json;
using System.Threading.Tasks;

var fileBytes = File.ReadAllBytes("/path/to/your/file.pdf");
var base64 = Convert.ToBase64String(fileBytes);

var payload = new
{
    file = base64,
    filename = "document.pdf"
};

using var client = new HttpClient();
client.DefaultRequestHeaders.Add("Accept", "application/vnd.Creative Force.v2.3+json");
client.DefaultRequestHeaders.Add("x-api-key", "YOUR_API_KEY");

var json = JsonSerializer.Serialize(payload);
var content = new StringContent(json, Encoding.UTF8, "application/json");
var response = await client.PostAsync("https://api.us.cr4ce.com/application/{application_slug}/upload/{field_slug}", content);

import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.Base64;

var fileBytes = Files.readAllBytes(Paths.get("/path/to/your/file.pdf"));
var base64 = Base64.getEncoder().encodeToString(fileBytes);

var json = String.format(
    "{\"file\":\"%s\",\"filename\":\"document.pdf\"}", base64
);

var client = HttpClient.newHttpClient();
var request = HttpRequest.newBuilder()
    .uri(URI.create("https://api.us.cr4ce.com/application/{application_slug}/upload/{field_slug}"))
    .header("Accept", "application/vnd.Creative Force.v2.3+json")
    .header("x-api-key", "YOUR_API_KEY")
    .header("Content-Type", "application/json")
    .POST(HttpRequest.BodyPublishers.ofString(json))
    .build();

var response = client.send(request, HttpResponse.BodyHandlers.ofString());

​Base64 encoding

Base64 encoding