{"json_modified": "2016-07-19T04:59:31.009882", "uuid": "328562ae-40ba-4f98-a7e7-ff6560f72e59", "title": "Header", "url": "/en-US/docs/Glossary/Header", "tags": ["glossary", "WebMechanics", "Glossary"], "translations": [], "modified": "2016-07-19T04:59:31", "label": "Header", "localization_tags": [], "locale": "en-US", "id": 188821, "last_edit": "2016-07-19T04:59:27", "summary": "An <strong>HTTP header</strong> is a field of an HTTP request or response that passes additional information, altering or precising the semantics of the message or of the body. Headers are case-insensitive, begins at the start of a line and are immediately followed by a <code>':'</code> and a value depending of the header itself. The value finish at the next CR or at the end of the message.", "sections": [{"id": "Learn_more", "title": "Learn more"}, {"id": "General_knowledge", "title": "General knowledge"}, {"id": "Technical_knowledge", "title": "Technical knowledge"}], "slug": "Glossary/Header", "review_tags": []}