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Code Issues Releases Wiki Activity

Whitelist Facebook query parameters

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This commit is contained in:
M66B 2021-02-12 19:58:20 +01:00
parent 6c0761c06d
commit dd9dccbe1d
1 changed files with 24 additions and 5 deletions
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29
app/src/main/java/eu/faircode/email/AdapterMessage.java
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@ -302,8 +302,14 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
"kclickid" // https://support.freespee.com/hc/en-us/articles/202577831-Kenshoo-integration
));
private static final List<String> FACEBOOK_QUERY = Collections.unmodifiableList(Arrays.asList(
"medium", "ref", "n_m"
// https://github.com/snarfed/granary/blob/master/granary/facebook.py#L1789
private static final List<String> FACEBOOK_WHITELIST_PATH = Collections.unmodifiableList(Arrays.asList(
"/nd/", "/n/", "/story.php"
));
private static final List<String> FACEBOOK_WHITELIST_QUERY = Collections.unmodifiableList(Arrays.asList(
"story_fbid", "fbid", "id", "comment_id"
));
// https://www.iana.org/assignments/imap-jmap-keywords/imap-jmap-keywords.xhtml
@ -6387,14 +6393,26 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
builder = url.buildUpon();
builder.clearQuery();
String host = uri.getHost();
String path = uri.getPath();
if (host != null)
host = host.toLowerCase(Locale.ROOT);
if (path != null)
path = path.toLowerCase(Locale.ROOT);
boolean first = "www.facebook.com".equals(host);
for (String key : url.getQueryParameterNames()) {
// https://en.wikipedia.org/wiki/UTM_parameters
// https://docs.oracle.com/en/cloud/saas/marketing/eloqua-user/Help/EloquaAsynchronousTrackingScripts/EloquaTrackingParameters.htm
String lkey = key.toLowerCase(Locale.ROOT);
if (PARANOID_QUERY.contains(lkey) ||
lkey.startsWith("utm_") || lkey.startsWith("elq") ||
("www.facebook.com".equalsIgnoreCase(uri.getHost()) && FACEBOOK_QUERY.contains(lkey)) ||
("store.steampowered.com".equalsIgnoreCase(uri.getHost()) && "snr".equals(lkey)))
lkey.startsWith("utm_") ||
lkey.startsWith("elq") ||
((host != null && host.endsWith("facebook.com")) &&
!first &&
FACEBOOK_WHITELIST_PATH.contains(path) &&
!FACEBOOK_WHITELIST_QUERY.contains(lkey)) ||
("store.steampowered.com".equals(host) &&
"snr".equals(lkey)))
changed = true;
else if (!TextUtils.isEmpty(key))
for (String value : url.getQueryParameters(key)) {
@ -6409,6 +6427,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
}
builder.appendQueryParameter(key, value);
}
first = false;
}
return (changed ? builder.build() : null);