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",[611,665,613],{},".",[668,669,671],"h2",{"id":670},"why","Why",[673,674,675,683,692],"ul",{},[676,677,678,682],"li",{},[679,680,681],"strong",{},"Triage at the receiver."," Quickly distinguish evlog traffic from other clients in the receiving system's logs.",[676,684,685,688,689,691],{},[679,686,687],{},"Track adapter usage and version drift."," Roll out a new evlog version and watch the ",[611,690,613],{}," distribution change centrally.",[676,693,694,697,698,700],{},[679,695,696],{},"Debug a specific drain."," Filter by ",[611,699,626],{}," to isolate one adapter's behavior in a sea of incoming requests.",[668,702,704],{"id":703},"reading-the-version","Reading the version",[583,706,707,708,711],{},"Both constants are exported from ",[611,709,710],{},"evlog\u002Ftoolkit"," so your drain (or your receiver) can reference the canonical values:",[713,714,719],"pre",{"className":715,"code":716,"language":717,"meta":718,"style":718},"language-ts shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","import { EVLOG_USER_AGENT, EVLOG_VERSION } from 'evlog\u002Ftoolkit'\n\nconsole.log(EVLOG_VERSION)    \u002F\u002F → \"2.16.0\"\nconsole.log(EVLOG_USER_AGENT) \u002F\u002F → \"evlog\u002F2.16.0\"\n","ts","",[611,720,721,759,766,785],{"__ignoreMap":718},[722,723,726,730,734,738,741,744,747,750,753,756],"span",{"class":724,"line":725},"line",1,[722,727,729],{"class":728},"s7zQu","import",[722,731,733],{"class":732},"sMK4o"," {",[722,735,737],{"class":736},"sTEyZ"," EVLOG_USER_AGENT",[722,739,740],{"class":732},",",[722,742,743],{"class":736}," EVLOG_VERSION",[722,745,746],{"class":732}," }",[722,748,749],{"class":728}," from",[722,751,752],{"class":732}," '",[722,754,710],{"class":755},"sfazB",[722,757,758],{"class":732},"'\n",[722,760,762],{"class":724,"line":761},2,[722,763,765],{"emptyLinePlaceholder":764},true,"\n",[722,767,769,772,774,778,781],{"class":724,"line":768},3,[722,770,771],{"class":736},"console",[722,773,666],{"class":732},[722,775,777],{"class":776},"s2Zo4","log",[722,779,780],{"class":736},"(EVLOG_VERSION)    ",[722,782,784],{"class":783},"sHwdD","\u002F\u002F → \"2.16.0\"\n",[722,786,788,790,792,794,797],{"class":724,"line":787},4,[722,789,771],{"class":736},[722,791,666],{"class":732},[722,793,777],{"class":776},[722,795,796],{"class":736},"(EVLOG_USER_AGENT) ",[722,798,799],{"class":783},"\u002F\u002F → \"evlog\u002F2.16.0\"\n",[668,801,803],{"id":802},"overriding-from-a-custom-drain","Overriding from a custom drain",[583,805,806,807,813,814,817,818,821,822,817,824,827],{},"Adapters built with ",[808,809,810],"a",{"href":504},[611,811,812],{},"defineHttpDrain()"," automatically pass the drain ",[611,815,816],{},"name"," as ",[611,819,820],{},"source"," and the canonical ",[611,823,618],{},[611,825,826],{},"userAgent",". You don't need to think about it.",[583,829,830,831,834,835,837,838,840,841,843],{},"When you build a drain on top of ",[611,832,833],{},"httpPost"," from ",[611,836,710],{}," directly (e.g. for a fork with a different identity, or for a vendor that wants its own UA), pass ",[611,839,820],{}," and\u002For ",[611,842,826],{}," to override:",[713,845,847],{"className":715,"code":846,"language":717,"meta":718,"style":718},"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",[611,848,849,868,872,885,905,934,951,965,982,1001,1021,1030],{"__ignoreMap":718},[722,850,851,853,855,858,860,862,864,866],{"class":724,"line":725},[722,852,729],{"class":728},[722,854,733],{"class":732},[722,856,857],{"class":736}," httpPost",[722,859,746],{"class":732},[722,861,749],{"class":728},[722,863,752],{"class":732},[722,865,710],{"class":755},[722,867,758],{"class":732},[722,869,870],{"class":724,"line":761},[722,871,765],{"emptyLinePlaceholder":764},[722,873,874,877,879,882],{"class":724,"line":768},[722,875,876],{"class":728},"await",[722,878,857],{"class":776},[722,880,881],{"class":736},"(",[722,883,884],{"class":732},"{\n",[722,886,887,891,894,896,899,902],{"class":724,"line":787},[722,888,890],{"class":889},"swJcz","  url",[722,892,893],{"class":732},":",[722,895,752],{"class":732},[722,897,898],{"class":755},"https:\u002F\u002Fmy-platform.example.com\u002Fingest",[722,900,901],{"class":732},"'",[722,903,904],{"class":732},",\n",[722,906,908,911,913,915,917,920,922,924,926,929,931],{"class":724,"line":907},5,[722,909,910],{"class":889},"  headers",[722,912,893],{"class":732},[722,914,733],{"class":732},[722,916,752],{"class":732},[722,918,919],{"class":889},"Content-Type",[722,921,901],{"class":732},[722,923,893],{"class":732},[722,925,752],{"class":732},[722,927,928],{"class":755},"application\u002Fjson",[722,930,901],{"class":732},[722,932,933],{"class":732}," },\n",[722,935,937,940,942,944,947,949],{"class":724,"line":936},6,[722,938,939],{"class":889},"  body",[722,941,893],{"class":732},[722,943,752],{"class":732},[722,945,946],{"class":755},"[]",[722,948,901],{"class":732},[722,950,904],{"class":732},[722,952,954,957,959,963],{"class":724,"line":953},7,[722,955,956],{"class":889},"  timeout",[722,958,893],{"class":732},[722,960,962],{"class":961},"sbssI"," 5000",[722,964,904],{"class":732},[722,966,968,971,973,975,978,980],{"class":724,"line":967},8,[722,969,970],{"class":889},"  label",[722,972,893],{"class":732},[722,974,752],{"class":732},[722,976,977],{"class":755},"my-platform",[722,979,901],{"class":732},[722,981,904],{"class":732},[722,983,985,988,990,992,994,996,998],{"class":724,"line":984},9,[722,986,987],{"class":889},"  source",[722,989,893],{"class":732},[722,991,752],{"class":732},[722,993,977],{"class":755},[722,995,901],{"class":732},[722,997,740],{"class":732},[722,999,1000],{"class":783},"           \u002F\u002F sent as X-Evlog-Source\n",[722,1002,1004,1007,1009,1011,1014,1016,1018],{"class":724,"line":1003},10,[722,1005,1006],{"class":889},"  userAgent",[722,1008,893],{"class":732},[722,1010,752],{"class":732},[722,1012,1013],{"class":755},"my-fork\u002F1.0",[722,1015,901],{"class":732},[722,1017,740],{"class":732},[722,1019,1020],{"class":783},"        \u002F\u002F overrides the default User-Agent\n",[722,1022,1024,1027],{"class":724,"line":1023},11,[722,1025,1026],{"class":783},"  \u002F\u002F userAgent: false,",[722,1028,1029],{"class":783},"             \u002F\u002F suppress the header entirely\n",[722,1031,1033,1036],{"class":724,"line":1032},12,[722,1034,1035],{"class":732},"}",[722,1037,1038],{"class":736},")\n",[668,1040,1042],{"id":1041},"next-steps","Next steps",[673,1044,1045,1055],{},[676,1046,1047,1050,1051,1054],{},[808,1048,1049],{"href":504},"Custom Drains",": ",[611,1052,1053],{},"defineHttpDrain"," injects identity headers automatically",[676,1056,1057,1060],{},[808,1058,1059],{"href":509},"Drain Pipeline",": wrap any drain in batch + retry while keeping identity headers",[1062,1063,1064],"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":718,"searchDepth":761,"depth":761,"links":1066},[1067,1068,1069,1070],{"id":670,"depth":761,"text":671},{"id":703,"depth":761,"text":704},{"id":802,"depth":761,"text":803},{"id":1041,"depth":761,"text":1042},"Every drain request carries User-Agent and X-Evlog-Source so receivers can triage the traffic. Override or suppress them when you need to.","md",[1074],{"label":1049,"icon":506,"to":504,"color":1075,"variant":1076},"neutral","subtle",{},{"title":498,"icon":501},{"title":578,"description":1071},"9-jU3J69nXSua-FxSUy-KREnVDLGGawYYXsbgXPprR4",[1082,1084],{"title":494,"path":495,"stem":496,"description":1083,"icon":69,"children":-1},"Decide after the fact whether to keep an event, knowing its status, duration, and errors. Keep every error, throw away healthy noise.",{"title":503,"path":504,"stem":505,"description":1085,"icon":506,"children":-1},"Build a drain for any backend without a built-in adapter. Config resolution, retries, timeouts, and identity headers are handled for you.",1790280248883]