---
name: "Mojo::Transaction"
section: "3pm"
platform: "linux"
package: "libmojolicious-perl"
version: "9.39+dfsg-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/Mojo::Transaction"
---

# Mojo::Transaction(3pm)

Transaction base class

## NAME

Mojo::Transaction - Transaction base class

## SYNOPSIS

```
  package Mojo::Transaction::MyTransaction;
  use Mojo::Base 'Mojo::Transaction';
  sub client_read  {...}
  sub client_write {...}
  sub server_read  {...}
  sub server_write {...}
```

## DESCRIPTION

Mojo::Transaction is an abstract base class for transactions, like Mojo::Transaction::HTTP and Mojo::Transaction::WebSocket.

## EVENTS

Mojo::Transaction inherits all events from Mojo::EventEmitter and can emit the following new ones.

### connection

```
  $tx->on(connection => sub ($tx, $connection) {...});
```

Emitted when a connection has been assigned to transaction.

### finish

```
  $tx->on(finish => sub ($tx) {...});
```

Emitted when transaction is finished.

## ATTRIBUTES

Mojo::Transaction implements the following attributes.

### kept\_alive

```
  my $bool = $tx->kept_alive;
  $tx      = $tx->kept_alive($bool);
```

Connection has been kept alive.

### local\_address

```
  my $address = $tx->local_address;
  $tx         = $tx->local_address('127.0.0.1');
```

Local interface address.

### local\_port

```
  my $port = $tx->local_port;
  $tx      = $tx->local_port(8080);
```

Local interface port.

### original\_remote\_address

```
  my $address = $tx->original_remote_address;
  $tx         = $tx->original_remote_address('127.0.0.1');
```

Remote interface address.

### remote\_port

```
  my $port = $tx->remote_port;
  $tx      = $tx->remote_port(8081);
```

Remote interface port.

### req

```
  my $req = $tx->req;
  $tx     = $tx->req(Mojo::Message::Request->new);
```

HTTP request, defaults to a Mojo::Message::Request object.

```
  # Access request information
  my $method = $tx->req->method;
  my $url    = $tx->req->url->to_abs;
  my $info   = $tx->req->url->to_abs->userinfo;
  my $host   = $tx->req->url->to_abs->host;
  my $agent  = $tx->req->headers->user_agent;
  my $custom = $tx->req->headers->header('Custom-Header');
  my $bytes  = $tx->req->body;
  my $str    = $tx->req->text;
  my $hash   = $tx->req->params->to_hash;
  my $all    = $tx->req->uploads;
  my $value  = $tx->req->json;
  my $foo    = $tx->req->json('/23/foo');
  my $dom    = $tx->req->dom;
  my $bar    = $tx->req->dom('div.bar')->first->text;
```

### res

```
  my $res = $tx->res;
  $tx     = $tx->res(Mojo::Message::Response->new);
```

HTTP response, defaults to a Mojo::Message::Response object.

```
  # Access response information
  my $code    = $tx->res->code;
  my $message = $tx->res->message;
  my $server  = $tx->res->headers->server;
  my $custom  = $tx->res->headers->header('Custom-Header');
  my $bytes   = $tx->res->body;
  my $str     = $tx->res->text;
  my $value   = $tx->res->json;
  my $foo     = $tx->res->json('/23/foo');
  my $dom     = $tx->res->dom;
  my $bar     = $tx->res->dom('div.bar')->first->text;
```

## METHODS

Mojo::Transaction inherits all methods from Mojo::EventEmitter and implements the following new ones.

### client\_read

```
  $tx->client_read($bytes);
```

Read data client-side, used to implement user agents such as Mojo::UserAgent. Meant to be overloaded in a subclass.

### client\_write

```
  my $bytes = $tx->client_write;
```

Write data client-side, used to implement user agents such as Mojo::UserAgent. Meant to be overloaded in a subclass.

### closed

```
  $tx = $tx->closed;
```

Same as "completed", but also indicates that all transaction data has been sent.

### completed

```
  $tx = $tx->completed;
```

Low-level method to finalize transaction.

### connection

```
  my $id = $tx->connection;
  $tx    = $tx->connection($id);
```

Connection identifier.

### error

```
  my $err = $tx->error;
```

Get request or response error and return `"undef"` if there is no error.

```
  # Longer version
  my $err = $tx->req->error || $tx->res->error;
  # Check for 4xx/5xx response and connection errors
  if (my $err = $tx->error) {
    die "$err->{code} response: $err->{message}" if $err->{code};
    die "Connection error: $err->{message}";
  }
```

### is\_finished

```
  my $bool = $tx->is_finished;
```

Check if transaction is finished.

### is\_websocket

```
  my $bool = $tx->is_websocket;
```

False, this is not a Mojo::Transaction::WebSocket object.

### remote\_address

```
  my $address = $tx->remote_address;
  $tx         = $tx->remote_address('127.0.0.1');
```

Same as "original\_remote\_address" unless "req" has been performed via a "reverse\_proxy" in Mojo::Message::Request. If so then the last value of `"X-Forwarded-For"` header is returned. Additionally if "trusted\_proxies" in Mojo::Message::Request are also provided then the original address must be trusted and any `"X-Forwarded-For"` entries that are trusted are ignored, returning the last untrusted address or the first address if all are trusted.

### result

```
  my $res = $tx->result;
```

Returns the Mojo::Message::Response object from "res" or dies if a connection error has occurred.

```
  # Fine grained response handling (dies on connection errors)
  my $res = $tx->result;
  if    ($res->is_success)  { say $res->body }
  elsif ($res->is_error)    { say $res->message }
  elsif ($res->code == 301) { say $res->headers->location }
  else                      { say 'Whatever...' }
```

### server\_read

```
  $tx->server_read($bytes);
```

Read data server-side, used to implement web servers such as Mojo::Server::Daemon. Meant to be overloaded in a subclass.

### server\_write

```
  my $bytes = $tx->server_write;
```

Write data server-side, used to implement web servers such as Mojo::Server::Daemon. Meant to be overloaded in a subclass.

## SEE ALSO

Mojolicious, Mojolicious::Guides, \<https://mojolicious.org\>.