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* split up select.md * array-join.md basic refactoring * distinct.md basic refactoring * format.md basic refactoring * from.md basic refactoring * group-by.md basic refactoring * having.md basic refactoring * additional index.md refactoring * into-outfile.md basic refactoring * join.md basic refactoring * limit.md basic refactoring * limit-by.md basic refactoring * order-by.md basic refactoring * prewhere.md basic refactoring * adjust operators/index.md links * adjust sample.md links * adjust more links * adjust operatots links * fix some links * adjust aggregate function article titles * basic refactor of remaining select clauses * absolute paths in make_links.sh * run make_links.sh * remove old select.md locations * translate docs/es * translate docs/fr * translate docs/fa * remove old operators.md location * change operators.md links * adjust links in docs/es * adjust links in docs/es * minor texts adjustments * wip * update machine translations to use new links * fix changelog * es build fixes * get rid of some select.md links * temporary adjust ru links * temporary adjust more ru links * improve curly brace handling * adjust ru as well * fa build fix * ru link fixes * zh link fixes * temporary disable part of anchor checks
83 lines
2.6 KiB
Markdown
83 lines
2.6 KiB
Markdown
---
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machine_translated: true
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machine_translated_rev: 72537a2d527c63c07aa5d2361a8829f3895cf2bd
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toc_priority: 41
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toc_title: URL
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---
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# URL(URL, Formato) {#table_engines-url}
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Administra datos en un servidor HTTP/HTTPS remoto. Este motor es similar
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a la [File](file.md) motor.
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## Uso del motor en el servidor ClickHouse {#using-the-engine-in-the-clickhouse-server}
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El `format` debe ser uno que ClickHouse pueda usar en
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`SELECT` consultas y, si es necesario, en `INSERTs`. Para obtener la lista completa de formatos admitidos, consulte
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[Formato](../../../interfaces/formats.md#formats).
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El `URL` debe ajustarse a la estructura de un localizador uniforme de recursos. La dirección URL especificada debe apuntar a un servidor
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que utiliza HTTP o HTTPS. Esto no requiere ningún
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encabezados adicionales para obtener una respuesta del servidor.
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`INSERT` y `SELECT` las consultas se transforman en `POST` y `GET` peticiones,
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respectivamente. Para el procesamiento `POST` solicitudes, el servidor remoto debe admitir
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[Codificación de transferencia fragmentada](https://en.wikipedia.org/wiki/Chunked_transfer_encoding).
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Puede limitar el número máximo de saltos de redirección HTTP GET utilizando el [Nombre de la red inalámbrica (SSID):](../../../operations/settings/settings.md#setting-max_http_get_redirects) configuración.
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**Ejemplo:**
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**1.** Crear un `url_engine_table` tabla en el servidor :
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``` sql
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CREATE TABLE url_engine_table (word String, value UInt64)
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ENGINE=URL('http://127.0.0.1:12345/', CSV)
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```
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**2.** Cree un servidor HTTP básico utilizando las herramientas estándar de Python 3 y
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comenzarlo:
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``` python3
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from http.server import BaseHTTPRequestHandler, HTTPServer
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class CSVHTTPServer(BaseHTTPRequestHandler):
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def do_GET(self):
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self.send_response(200)
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self.send_header('Content-type', 'text/csv')
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self.end_headers()
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self.wfile.write(bytes('Hello,1\nWorld,2\n', "utf-8"))
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if __name__ == "__main__":
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server_address = ('127.0.0.1', 12345)
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HTTPServer(server_address, CSVHTTPServer).serve_forever()
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```
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``` bash
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$ python3 server.py
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```
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**3.** Solicitar datos:
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``` sql
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SELECT * FROM url_engine_table
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```
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``` text
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┌─word──┬─value─┐
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│ Hello │ 1 │
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│ World │ 2 │
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└───────┴───────┘
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```
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## Detalles de la implementación {#details-of-implementation}
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- Las lecturas y escrituras pueden ser paralelas
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- No soportado:
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- `ALTER` y `SELECT...SAMPLE` operación.
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- Índices.
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- Replicación.
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[Artículo Original](https://clickhouse.tech/docs/en/operations/table_engines/url/) <!--hide-->
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