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You don't need to think about it.",[441,687,688,689,692,693,695,696,698,699,701],{},"When you build a drain on top of ",[469,690,691],{},"httpPost"," from ",[469,694,568],{}," directly (e.g. for a fork with a different identity, or for a vendor that wants its own UA), pass ",[469,697,678],{}," and\u002For ",[469,700,684],{}," to override:",[571,703,705],{"className":573,"code":704,"language":575,"meta":576,"style":576},"import { httpPost } from 'evlog\u002Ftoolkit'\n\nawait httpPost({\n  url: 'https:\u002F\u002Fmy-platform.example.com\u002Fingest',\n  headers: { 'Content-Type': 'application\u002Fjson' },\n  body: '[]',\n  timeout: 5000,\n  label: 'my-platform',\n  source: 'my-platform',           \u002F\u002F sent as X-Evlog-Source\n  userAgent: 'my-fork\u002F1.0',        \u002F\u002F overrides the default User-Agent\n  \u002F\u002F userAgent: false,             \u002F\u002F suppress the header entirely\n})\n",[469,706,707,726,730,743,763,792,809,823,840,859,879,888],{"__ignoreMap":576},[580,708,709,711,713,716,718,720,722,724],{"class":582,"line":583},[580,710,587],{"class":586},[580,712,591],{"class":590},[580,714,715],{"class":594}," httpPost",[580,717,604],{"class":590},[580,719,607],{"class":586},[580,721,610],{"class":590},[580,723,568],{"class":613},[580,725,616],{"class":590},[580,727,728],{"class":582,"line":619},[580,729,623],{"emptyLinePlaceholder":622},[580,731,732,735,737,740],{"class":582,"line":626},[580,733,734],{"class":586},"await",[580,736,715],{"class":634},[580,738,739],{"class":594},"(",[580,741,742],{"class":590},"{\n",[580,744,745,749,752,754,757,760],{"class":582,"line":645},[580,746,748],{"class":747},"swJcz","  url",[580,750,751],{"class":590},":",[580,753,610],{"class":590},[580,755,756],{"class":613},"https:\u002F\u002Fmy-platform.example.com\u002Fingest",[580,758,759],{"class":590},"'",[580,761,762],{"class":590},",\n",[580,764,766,769,771,773,775,778,780,782,784,787,789],{"class":582,"line":765},5,[580,767,768],{"class":747},"  headers",[580,770,751],{"class":590},[580,772,591],{"class":590},[580,774,610],{"class":590},[580,776,777],{"class":747},"Content-Type",[580,779,759],{"class":590},[580,781,751],{"class":590},[580,783,610],{"class":590},[580,785,786],{"class":613},"application\u002Fjson",[580,788,759],{"class":590},[580,790,791],{"class":590}," },\n",[580,793,795,798,800,802,805,807],{"class":582,"line":794},6,[580,796,797],{"class":747},"  body",[580,799,751],{"class":590},[580,801,610],{"class":590},[580,803,804],{"class":613},"[]",[580,806,759],{"class":590},[580,808,762],{"class":590},[580,810,812,815,817,821],{"class":582,"line":811},7,[580,813,814],{"class":747},"  timeout",[580,816,751],{"class":590},[580,818,820],{"class":819},"sbssI"," 5000",[580,822,762],{"class":590},[580,824,826,829,831,833,836,838],{"class":582,"line":825},8,[580,827,828],{"class":747},"  label",[580,830,751],{"class":590},[580,832,610],{"class":590},[580,834,835],{"class":613},"my-platform",[580,837,759],{"class":590},[580,839,762],{"class":590},[580,841,843,846,848,850,852,854,856],{"class":582,"line":842},9,[580,844,845],{"class":747},"  source",[580,847,751],{"class":590},[580,849,610],{"class":590},[580,851,835],{"class":613},[580,853,759],{"class":590},[580,855,598],{"class":590},[580,857,858],{"class":641},"           \u002F\u002F sent as X-Evlog-Source\n",[580,860,862,865,867,869,872,874,876],{"class":582,"line":861},10,[580,863,864],{"class":747},"  userAgent",[580,866,751],{"class":590},[580,868,610],{"class":590},[580,870,871],{"class":613},"my-fork\u002F1.0",[580,873,759],{"class":590},[580,875,598],{"class":590},[580,877,878],{"class":641},"        \u002F\u002F overrides the default User-Agent\n",[580,880,882,885],{"class":582,"line":881},11,[580,883,884],{"class":641},"  \u002F\u002F userAgent: false,",[580,886,887],{"class":641},"             \u002F\u002F suppress the header entirely\n",[580,889,891,894],{"class":582,"line":890},12,[580,892,893],{"class":590},"}",[580,895,896],{"class":594},")\n",[526,898,900],{"id":899},"next-steps","Next steps",[531,902,903,913],{},[534,904,905,908,909,912],{},[666,906,907],{"href":395},"Custom Drains"," — ",[469,910,911],{},"defineHttpDrain"," injects identity headers automatically",[534,914,915,918],{},[666,916,917],{"href":400},"Drain Pipeline"," — wrap any drain in batch + retry while keeping identity headers",[920,921,922],"style",{},"html pre.shiki code .s7zQu, html code.shiki .s7zQu{--shiki-light:#39ADB5;--shiki-light-font-style:italic;--shiki-default:#89DDFF;--shiki-default-font-style:italic;--shiki-dark:#89DDFF;--shiki-dark-font-style:italic}html pre.shiki code .sMK4o, html code.shiki .sMK4o{--shiki-light:#39ADB5;--shiki-default:#89DDFF;--shiki-dark:#89DDFF}html pre.shiki code .sTEyZ, html code.shiki .sTEyZ{--shiki-light:#90A4AE;--shiki-default:#EEFFFF;--shiki-dark:#BABED8}html pre.shiki code .sfazB, html code.shiki .sfazB{--shiki-light:#91B859;--shiki-default:#C3E88D;--shiki-dark:#C3E88D}html pre.shiki code .s2Zo4, html code.shiki .s2Zo4{--shiki-light:#6182B8;--shiki-default:#82AAFF;--shiki-dark:#82AAFF}html pre.shiki code .sHwdD, html code.shiki .sHwdD{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#546E7A;--shiki-default-font-style:italic;--shiki-dark:#676E95;--shiki-dark-font-style:italic}html .light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html.light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html.dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html pre.shiki code .swJcz, html code.shiki .swJcz{--shiki-light:#E53935;--shiki-default:#F07178;--shiki-dark:#F07178}html pre.shiki code .sbssI, html code.shiki .sbssI{--shiki-light:#F76D47;--shiki-default:#F78C6C;--shiki-dark:#F78C6C}",{"title":576,"searchDepth":619,"depth":619,"links":924},[925,926,927,928],{"id":528,"depth":619,"text":529},{"id":561,"depth":619,"text":562},{"id":660,"depth":619,"text":661},{"id":899,"depth":619,"text":900},"Every drain request sent by evlog is tagged with User-Agent and X-Evlog-Source headers so receivers can identify and triage the traffic. Override or suppress them when your custom drain needs different identity.","md",[932],{"label":907,"icon":397,"to":395,"color":933,"variant":934},"neutral","subtle",{},{"title":389,"icon":392},{"title":436,"description":929},"UpSbbTef47vMxtu4Pph48SjBF68OaEPBZOLoGhRxGZU",[940,942],{"title":385,"path":386,"stem":387,"description":941,"icon":64,"children":-1},"Decide post-hoc whether to keep an event with full knowledge of its outcome (status, duration, errors). The opposite of head sampling — keep all errors and slow requests while throwing away healthy noise.",{"title":394,"path":395,"stem":396,"description":943,"icon":397,"children":-1},"Build a drain for any backend without a built-in adapter — defineHttpDrain for HTTP destinations, defineDrain for any other transport. Standardized config resolution, retries, timeouts, and identity headers handled for you.",1778443957928]