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",[482,686,687],{},"name"," as ",[482,690,691],{},"source"," and the canonical ",[482,694,489],{},[482,696,697],{},"userAgent",". You don't need to think about it.",[454,700,701,702,705,706,708,709,711,712,714],{},"When you build a drain on top of ",[482,703,704],{},"httpPost"," from ",[482,707,581],{}," directly (e.g. for a fork with a different identity, or for a vendor that wants its own UA), pass ",[482,710,691],{}," and\u002For ",[482,713,697],{}," to override:",[584,716,718],{"className":586,"code":717,"language":588,"meta":589,"style":589},"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",[482,719,720,739,743,756,776,805,822,836,853,872,892,901],{"__ignoreMap":589},[593,721,722,724,726,729,731,733,735,737],{"class":595,"line":596},[593,723,600],{"class":599},[593,725,604],{"class":603},[593,727,728],{"class":607}," httpPost",[593,730,617],{"class":603},[593,732,620],{"class":599},[593,734,623],{"class":603},[593,736,581],{"class":626},[593,738,629],{"class":603},[593,740,741],{"class":595,"line":632},[593,742,636],{"emptyLinePlaceholder":635},[593,744,745,748,750,753],{"class":595,"line":639},[593,746,747],{"class":599},"await",[593,749,728],{"class":647},[593,751,752],{"class":607},"(",[593,754,755],{"class":603},"{\n",[593,757,758,762,765,767,770,773],{"class":595,"line":658},[593,759,761],{"class":760},"swJcz","  url",[593,763,764],{"class":603},":",[593,766,623],{"class":603},[593,768,769],{"class":626},"https:\u002F\u002Fmy-platform.example.com\u002Fingest",[593,771,772],{"class":603},"'",[593,774,775],{"class":603},",\n",[593,777,779,782,784,786,788,791,793,795,797,800,802],{"class":595,"line":778},5,[593,780,781],{"class":760},"  headers",[593,783,764],{"class":603},[593,785,604],{"class":603},[593,787,623],{"class":603},[593,789,790],{"class":760},"Content-Type",[593,792,772],{"class":603},[593,794,764],{"class":603},[593,796,623],{"class":603},[593,798,799],{"class":626},"application\u002Fjson",[593,801,772],{"class":603},[593,803,804],{"class":603}," },\n",[593,806,808,811,813,815,818,820],{"class":595,"line":807},6,[593,809,810],{"class":760},"  body",[593,812,764],{"class":603},[593,814,623],{"class":603},[593,816,817],{"class":626},"[]",[593,819,772],{"class":603},[593,821,775],{"class":603},[593,823,825,828,830,834],{"class":595,"line":824},7,[593,826,827],{"class":760},"  timeout",[593,829,764],{"class":603},[593,831,833],{"class":832},"sbssI"," 5000",[593,835,775],{"class":603},[593,837,839,842,844,846,849,851],{"class":595,"line":838},8,[593,840,841],{"class":760},"  label",[593,843,764],{"class":603},[593,845,623],{"class":603},[593,847,848],{"class":626},"my-platform",[593,850,772],{"class":603},[593,852,775],{"class":603},[593,854,856,859,861,863,865,867,869],{"class":595,"line":855},9,[593,857,858],{"class":760},"  source",[593,860,764],{"class":603},[593,862,623],{"class":603},[593,864,848],{"class":626},[593,866,772],{"class":603},[593,868,611],{"class":603},[593,870,871],{"class":654},"           \u002F\u002F sent as X-Evlog-Source\n",[593,873,875,878,880,882,885,887,889],{"class":595,"line":874},10,[593,876,877],{"class":760},"  userAgent",[593,879,764],{"class":603},[593,881,623],{"class":603},[593,883,884],{"class":626},"my-fork\u002F1.0",[593,886,772],{"class":603},[593,888,611],{"class":603},[593,890,891],{"class":654},"        \u002F\u002F overrides the default User-Agent\n",[593,893,895,898],{"class":595,"line":894},11,[593,896,897],{"class":654},"  \u002F\u002F userAgent: false,",[593,899,900],{"class":654},"             \u002F\u002F suppress the header entirely\n",[593,902,904,907],{"class":595,"line":903},12,[593,905,906],{"class":603},"}",[593,908,909],{"class":607},")\n",[539,911,913],{"id":912},"next-steps","Next steps",[544,915,916,926],{},[547,917,918,921,922,925],{},[679,919,920],{"href":408},"Custom Drains"," — ",[482,923,924],{},"defineHttpDrain"," injects identity headers automatically",[547,927,928,931],{},[679,929,930],{"href":413},"Drain Pipeline"," — wrap any drain in batch + retry while keeping identity headers",[933,934,935],"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":589,"searchDepth":632,"depth":632,"links":937},[938,939,940,941],{"id":541,"depth":632,"text":542},{"id":574,"depth":632,"text":575},{"id":673,"depth":632,"text":674},{"id":912,"depth":632,"text":913},"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",[945],{"label":920,"icon":410,"to":408,"color":946,"variant":947},"neutral","subtle",{},{"title":402,"icon":405},{"title":449,"description":942},"UpSbbTef47vMxtu4Pph48SjBF68OaEPBZOLoGhRxGZU",[953,955],{"title":398,"path":399,"stem":400,"description":954,"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":407,"path":408,"stem":409,"description":956,"icon":410,"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.",1782924673553]