{"id":15399858,"url":"https://github.com/mcollina/streampecker","last_synced_at":"2025-04-16T01:52:45.634Z","repository":{"id":41373563,"uuid":"508639628","full_name":"mcollina/streampecker","owner":"mcollina","description":"Peek a stream!","archived":false,"fork":false,"pushed_at":"2022-06-29T22:30:15.000Z","size":16,"stargazers_count":13,"open_issues_count":0,"forks_count":0,"subscribers_count":2,"default_branch":"main","last_synced_at":"2025-03-24T15:49:17.157Z","etag":null,"topics":[],"latest_commit_sha":null,"homepage":null,"language":"JavaScript","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"mit","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/mcollina.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null}},"created_at":"2022-06-29T10:09:59.000Z","updated_at":"2025-02-11T15:51:43.000Z","dependencies_parsed_at":"2022-09-26T21:11:19.331Z","dependency_job_id":null,"html_url":"https://github.com/mcollina/streampecker","commit_stats":null,"previous_names":[],"tags_count":1,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/mcollina%2Fstreampecker","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/mcollina%2Fstreampecker/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/mcollina%2Fstreampecker/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/mcollina%2Fstreampecker/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/mcollina","download_url":"https://codeload.github.com/mcollina/streampecker/tar.gz/refs/heads/main","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":249183064,"owners_count":21226140,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":[],"created_at":"2024-10-01T15:50:45.368Z","updated_at":"2025-04-16T01:52:45.613Z","avatar_url":"https://github.com/mcollina.png","language":"JavaScript","funding_links":[],"categories":[],"sub_categories":[],"readme":"# streampecker\n\nTransform stream that lets you peek the first line before deciding how to parse it.\n\n```\nnpm install streampecker\n```\n\nThis module was forked from [`peak-stream`](https://github.com/mafintosh/peak-stream) at version v1.1.3.\n\n## Usage\n\n```js\nconst pecker = require('streampecker')\nconst ldjson = require('ldjson-stream')\nconst csv = require('csv-parser')\nconst { Readable } = require('stream')\n\nconst isCSV = function (data) {\n  return data.toString().indexOf(',') \u003e -1\n}\n\nconst isJSON = function (data) {\n  try {\n    JSON.parse(data)\n    return true\n  } catch (err) {\n    return false\n  }\n}\n\nconst parser = function (stream) {\n  return pecker(stream, function (data) {\n    // maybe it is JSON?\n    if (isJSON(data)) return ldjson()\n\n    // maybe it is CSV?\n    if (isCSV(data)) return csv()\n\n    // we do not know - bail\n    throw new Error('No parser available')\n  })\n}\n\nlet parse\n\nparse = parser(Readable.from('{\"hello\":\"world\"}\\n{\"hello\":\"another\"}\\n'))\n\nparse.on('data', function (data) {\n  console.log('from ldj:', data)\n})\n\nparse = parser(Readable.from('test,header\\nvalue-1,value-2\\n'))\n\nparse.on('data', function (data) {\n  console.log('from csv:', data)\n})\n```\n\n## License\n\nMIT\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmcollina%2Fstreampecker","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fmcollina%2Fstreampecker","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmcollina%2Fstreampecker/lists"}