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</div>
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<h1>
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<a href="https://github.com/plausible/analytics/blob/main/lib/plausible/ingestion/source.ex#L1" title="View Source" class="icon-action" rel="help">
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<i class="ri-code-s-slash-line" aria-hidden="true"></i>
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<span class="sr-only">View Source</span>
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</a>
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<span translate="no">Plausible.Ingestion.Source</span>
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<small class="app-vsn" translate="no">(Plausible v0.0.1)</small>
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</h1>
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<section id="moduledoc">
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<p>Resolves the <code class="inline">source</code> dimension from a combination of <code class="inline">referer</code> header and either <code class="inline">utm_source</code>, <code class="inline">source</code>, or <code class="inline">ref</code> query parameter.</p>
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</section>
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<section id="summary" class="details-list">
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<h1 class="section-heading">
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<a class="hover-link" href="#summary">
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<i class="ri-link-m" aria-hidden="true"></i>
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</a>
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<span class="text">Summary</span>
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</h1>
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<div class="summary-functions summary">
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<h2>
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<a href="#functions">Functions</a>
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</h2>
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<div class="summary-row">
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<div class="summary-signature">
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<a href="#find_mapping/1" translate="no">find_mapping(source)</a>
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</div>
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</div>
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<div class="summary-row">
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<div class="summary-signature">
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<a href="#format_referrer/1" translate="no">format_referrer(referrer)</a>
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</div>
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</div>
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<div class="summary-row">
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<div class="summary-signature">
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<a href="#init/0" translate="no">init()</a>
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</div>
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</div>
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<div class="summary-row">
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<div class="summary-signature">
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<a href="#paid_source?/1" translate="no">paid_source?(source)</a>
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</div>
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</div>
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<div class="summary-row">
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<div class="summary-signature">
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<a href="#paid_sources/0" translate="no">paid_sources()</a>
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</div>
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</div>
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<div class="summary-row">
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<div class="summary-signature">
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<a href="#parse/1" translate="no">parse(ref)</a>
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</div>
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</div>
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<div class="summary-row">
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<div class="summary-signature">
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<a href="#resolve/1" translate="no">resolve(request)</a>
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</div>
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<div class="summary-synopsis"><p>Resolves the source of a session based on query params and the <code class="inline">Referer</code> header.</p></div>
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</div>
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</div>
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</section>
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<section id="functions" class="details-list">
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<h1 class="section-heading">
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<a class="hover-link" href="#functions">
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<i class="ri-link-m" aria-hidden="true"></i>
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</a>
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<span class="text">Functions</span>
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</h1>
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<div class="functions-list">
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<section class="detail" id="find_mapping/1">
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<div class="detail-header">
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<a href="#find_mapping/1" class="detail-link" title="Link to this function">
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<i class="ri-link-m" aria-hidden="true"></i>
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<span class="sr-only">Link to this function</span>
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</a>
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<h1 class="signature" translate="no">find_mapping(source)</h1>
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<a href="https://github.com/plausible/analytics/blob/main/lib/plausible/ingestion/source.ex#L110" class="icon-action" rel="help" title="View Source">
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<i class="ri-code-s-slash-line" aria-hidden="true"></i>
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<span class="sr-only">View Source</span>
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</a>
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</div>
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<section class="docstring">
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</section>
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</section>
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<section class="detail" id="format_referrer/1">
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<div class="detail-header">
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<a href="#format_referrer/1" class="detail-link" title="Link to this function">
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<i class="ri-link-m" aria-hidden="true"></i>
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<span class="sr-only">Link to this function</span>
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<h1 class="signature" translate="no">format_referrer(referrer)</h1>
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<a href="https://github.com/plausible/analytics/blob/main/lib/plausible/ingestion/source.ex#L119" class="icon-action" rel="help" title="View Source">
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<i class="ri-code-s-slash-line" aria-hidden="true"></i>
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<span class="sr-only">View Source</span>
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<section class="docstring">
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</section>
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</section>
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<section class="detail" id="init/0">
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<a href="#init/0" class="detail-link" title="Link to this function">
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<h1 class="signature" translate="no">init()</h1>
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<a href="https://github.com/plausible/analytics/blob/main/lib/plausible/ingestion/source.ex#L18" class="icon-action" rel="help" title="View Source">
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<section class="docstring">
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</section>
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</section>
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<section class="detail" id="paid_source?/1">
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<a href="#paid_source?/1" class="detail-link" title="Link to this function">
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<span class="sr-only">Link to this function</span>
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<h1 class="signature" translate="no">paid_source?(source)</h1>
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<a href="https://github.com/plausible/analytics/blob/main/lib/plausible/ingestion/source.ex#L44" class="icon-action" rel="help" title="View Source">
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<i class="ri-code-s-slash-line" aria-hidden="true"></i>
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<span class="sr-only">View Source</span>
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</a>
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</div>
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<section class="docstring">
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</section>
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</section>
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<section class="detail" id="paid_sources/0">
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<div class="detail-header">
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<a href="#paid_sources/0" class="detail-link" title="Link to this function">
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<i class="ri-link-m" aria-hidden="true"></i>
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<span class="sr-only">Link to this function</span>
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</a>
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<h1 class="signature" translate="no">paid_sources()</h1>
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<a href="https://github.com/plausible/analytics/blob/main/lib/plausible/ingestion/source.ex#L40" class="icon-action" rel="help" title="View Source">
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<i class="ri-code-s-slash-line" aria-hidden="true"></i>
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<span class="sr-only">View Source</span>
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<section class="docstring">
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</section>
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</section>
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<section class="detail" id="parse/1">
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<div class="detail-header">
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<a href="#parse/1" class="detail-link" title="Link to this function">
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<i class="ri-link-m" aria-hidden="true"></i>
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<span class="sr-only">Link to this function</span>
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</a>
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<h1 class="signature" translate="no">parse(ref)</h1>
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<a href="https://github.com/plausible/analytics/blob/main/lib/plausible/ingestion/source.ex#L96" class="icon-action" rel="help" title="View Source">
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<i class="ri-code-s-slash-line" aria-hidden="true"></i>
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<span class="sr-only">View Source</span>
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</a>
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<section class="docstring">
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</section>
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</section>
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<section class="detail" id="resolve/1">
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<a href="#resolve/1" class="detail-link" title="Link to this function">
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<span class="sr-only">Link to this function</span>
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<h1 class="signature" translate="no">resolve(request)</h1>
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<a href="https://github.com/plausible/analytics/blob/main/lib/plausible/ingestion/source.ex#L80" class="icon-action" rel="help" title="View Source">
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<i class="ri-code-s-slash-line" aria-hidden="true"></i>
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<span class="sr-only">View Source</span>
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</a>
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</div>
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<section class="docstring">
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<p>Resolves the source of a session based on query params and the <code class="inline">Referer</code> header.</p><p>When a query parameter like <code class="inline">utm_source</code> is present, it will be prioritized over the <code class="inline">Referer</code> header. When the URL does not contain a source tag, we fall
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back to using <code class="inline">Referer</code> to determine the source. This module also takes care of certain transformations to make the data more useful for the user:</p><ol><li>The RefInspector library is used to categorize referrers into "known" sources. For example, when the referrer is google.com or google.co.uk,
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it will always be stored as "Google" which is more useful for marketers.</li><li>On top of the standard RefInspector behaviour, we also keep a list of <code class="inline">custom_sources.json</code> which extends it with referrers that we have seen in the wild.
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For example, Wikipedia has many domains that need to be combined into a single known source. These could all in theory be <a href="https://github.com/snowplow-referer-parser/referer-parser">upstreamed</a>.</li><li>When a known source is supplied in utm_source (or source, ref) query parameter, we merge it with our known sources in a case-insensitive manner.</li><li>Our list of <code class="inline">custom_sources.json</code> also contains some commonly used utm_source shorthands for certain sources. URL tagging is a mess, and we can never do it
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perfectly, but at least we're making an effort for the most commonly used ones. For example, <code class="inline">ig -> Instagram</code> and <code class="inline">adwords -> Google</code>.</li></ol><h3 id="resolve/1-examples" class="section-heading">
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<a href="#resolve/1-examples" class="hover-link">
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<i class="ri-link-m" aria-hidden="true"></i>
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</a>
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<span class="text">Examples:</span>
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</h3>
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<p> iex> alias Plausible.Ingestion.{Source, Request}
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iex> base_request = %Request{uri: URI.parse("<a href="https://plausible.io%22)%7D">https://plausible.io")}</a>
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iex> Source.resolve(%{base_request | referrer: "<a href="https://google.com%22%7D">https://google.com"}</a>) # Known referrer from RefInspector
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"Google"
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iex> Source.resolve(%{base_request | query_params: %{"utm_source" => "google"}}) # Known source from RefInspector supplied as downcased utm_source by user
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"Google"
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iex> Source.resolve(%{base_request | query_params: %{"utm_source" => "GOOGLE"}}) # Known source from RefInspector supplied as uppercased utm_source by user
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"Google"
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iex> Source.resolve(%{base_request | referrer: "<a href="https://en.m.wikipedia.org%22%7D">https://en.m.wikipedia.org"}</a>) # Known referrer from custom_sources.json
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"Wikipedia"
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iex> Source.resolve(%{base_request | query_params: %{"utm_source" => "wikipedia"}}) # Known source from custom_sources.json supplied as downcased utm_source by user
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"Wikipedia"
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iex> Source.resolve(%{base_request | query_params: %{"utm_source" => "ig"}}) # Known utm_source from custom_sources.json
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"Instagram"
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iex> Source.resolve(%{base_request | referrer: "<a href="https://www.markosaric.com%22%7D">https://www.markosaric.com"}</a>) # Unknown source, it is just stored as the domain name
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"markosaric.com"</p>
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