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# Open a thread on a timeline entry

POST https://api.cloudraker.com/workspace/sessions/{sessionId}/threads
Content-Type: application/json

A reply opens a thread (spec §4.4/W6): the thread is rooted at an existing entry’s `seq`, and a later comment or turn carries the returned `thd_` id as its `threadId`. A `threadId` that is not a thread of this session is refused 404 wherever it is used, so nothing unvalidated lands on a permanent timeline. **Authorization:** `work_session:comment` on the session, OR `space:contribute` on one of its linked spaces; a desk session only for its owner. Any denial is 404.

Reference: https://docs.cloudraker.com/workspace/api/workspace-sessions/open-workspace-session-thread

## Authentication

- `Authorization` header (bearer token, required) — Bearer authentication of the form `Bearer <token>`, where token is your auth token.

## Request

### Path parameters

- `sessionId` (string, required)

### Body (application/json)

This endpoint expects an OpenWorkspaceThreadBody.

- `rootSeq` (integer, required)
- `archived` (boolean, optional)
- `anchor` (DocumentAnchor, optional)

## Response

### 201

The opened thread.

- `data` (WorkSessionThread, required)

## Errors

### 400 Bad Request Error

`validation_failed` — a malformed body, e.g. a missing `rootSeq`.

- `any`

### 404 Not Found Error

No such session, or the caller may not write it; `entry_not_found` — no entry at that `rootSeq`.

- `any`

## Types

### DocumentAnchor

- `artifactId` (string, required)
- `from` (integer, required)
- `to` (integer, required)

### WorkSessionThread

- `id` (string, required)
- `rootSeq` (integer, required)
- `createdAt` (datetime, required)
- `anchor` (WorkSessionThreadAnchor, required, nullable)
- `archivedAt` (datetime, optional, nullable)

### WorkSessionThreadAnchor

- `artifactId` (string, required)
- `from` (integer, required)
- `to` (integer, required)
- `quote` (string, optional)
- `sourceVersion` (integer, optional)

## Examples

**Request**

```json
{
  "rootSeq": 1
}
```

**Response**

```json
{
  "data": {
    "id": "thd_01J8Z…",
    "rootSeq": 12,
    "createdAt": "2024-01-15T09:30:00Z",
    "anchor": {
      "artifactId": "art_01J8Z…",
      "from": 512,
      "to": 640,
      "quote": "string",
      "sourceVersion": 1
    },
    "archivedAt": "2024-01-15T09:30:00Z"
  }
}
```

**SDK Code**

```python
import requests

url = "https://api.cloudraker.com/workspace/sessions/sessionId/threads"

payload = { "rootSeq": 1 }
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.json())
```

```javascript
const url = 'https://api.cloudraker.com/workspace/sessions/sessionId/threads';
const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: '{"rootSeq":1}'
};

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://api.cloudraker.com/workspace/sessions/sessionId/threads"

	payload := strings.NewReader("{\n  \"rootSeq\": 1\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://api.cloudraker.com/workspace/sessions/sessionId/threads")

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  \"rootSeq\": 1\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://api.cloudraker.com/workspace/sessions/sessionId/threads")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"rootSeq\": 1\n}")
  .asString();
```

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

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://api.cloudraker.com/workspace/sessions/sessionId/threads', [
  'body' => '{
  "rootSeq": 1
}',
  'headers' => [
    'Authorization' => 'Bearer <token>',
    'Content-Type' => 'application/json',
  ],
]);

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

```csharp
using RestSharp;

var client = new RestClient("https://api.cloudraker.com/workspace/sessions/sessionId/threads");
var request = new RestRequest(Method.POST);
request.AddHeader("Authorization", "Bearer <token>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"rootSeq\": 1\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = [
  "Authorization": "Bearer <token>",
  "Content-Type": "application/json"
]
let parameters = ["rootSeq": 1] as [String : Any]

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

let request = NSMutableURLRequest(url: NSURL(string: "https://api.cloudraker.com/workspace/sessions/sessionId/threads")! 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()
```