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# Reserve a file upload

POST https://ah-api.merge.dev/api/v1/files/
Content-Type: application/json

Registers a file's metadata and returns a short-lived upload URL plus the file_reference an upload tool takes. No bytes move here; send them to the upload URL next.

Reference: https://docs.merge.dev/merge-agent-handler/agent-handler/files/files-reserve

## Authentication

- `Authorization` header (bearer token, required) — Token-based authentication with required prefix "Bearer"

## Request

### Body (application/json)

This endpoint expects a FileTransferReserve.

- `filename` (string, required) — Name the file will carry into the connector.
- `content_type` (string, optional, default: application/octet-stream) — MIME type of the bytes; defaults to application/octet-stream.
- `size_bytes` (integer, optional) — Optional. Rejects a file over the limit before you send any bytes; the upload enforces the limit regardless.

## Response

### 201

- `file_reference` (string, required) — Pass this as the file_reference argument of an upload tool once the bytes are uploaded.
- `upload` (FileTransferUploadTarget, required) — Where and how to send the file's bytes.
- `max_size_bytes` (integer, required) — Largest file this upload accepts, in bytes.
- `expires_at` (datetime, required) — When the upload URL and the file reference both stop working.

## Errors

### 400 Bad Request Error

Invalid or missing file metadata.

- `any`

## Types

### FileTransferUploadTarget

- `url` (string, required) — Where to send the file's bytes.
- `method` (string, required) — HTTP method to use, always PUT.
- `headers` (map from string to string, required) — Headers to send with the upload. Authorization is a placeholder; send your own Access Key.

## Examples

**Request**

```json
{
  "filename": "string"
}
```

**Response**

```json
{
  "file_reference": "string",
  "upload": {
    "url": "string",
    "method": "string",
    "headers": {}
  },
  "max_size_bytes": 1,
  "expires_at": "2024-01-15T09:30:00Z"
}
```

**SDK Code**

```python
import requests

url = "https://ah-api.merge.dev/api/v1/files/"

payload = { "filename": "string" }
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.json())
```

```javascript
const url = 'https://ah-api.merge.dev/api/v1/files/';
const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: '{"filename":"string"}'
};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}
```

```go
package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://ah-api.merge.dev/api/v1/files/"

	payload := strings.NewReader("{\n  \"filename\": \"string\"\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}
```

```ruby
require 'uri'
require 'net/http'

url = URI("https://ah-api.merge.dev/api/v1/files/")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"filename\": \"string\"\n}"

response = http.request(request)
puts response.read_body
```

```java
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.post("https://ah-api.merge.dev/api/v1/files/")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"filename\": \"string\"\n}")
  .asString();
```

```php
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://ah-api.merge.dev/api/v1/files/', [
  'body' => '{
  "filename": "string"
}',
  'headers' => [
    'Authorization' => 'Bearer <token>',
    'Content-Type' => 'application/json',
  ],
]);

echo $response->getBody();
```

```csharp
using RestSharp;

var client = new RestClient("https://ah-api.merge.dev/api/v1/files/");
var request = new RestRequest(Method.POST);
request.AddHeader("Authorization", "Bearer <token>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"filename\": \"string\"\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = [
  "Authorization": "Bearer <token>",
  "Content-Type": "application/json"
]
let parameters = ["filename": "string"] as [String : Any]

let postData = JSONSerialization.data(withJSONObject: parameters, options: [])

let request = NSMutableURLRequest(url: NSURL(string: "https://ah-api.merge.dev/api/v1/files/")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers
request.httpBody = postData as Data

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```