/** Sanitize a CSS file. */
private boolean rewriteProxiedCss(
HttpRequest request,
HttpResponse response,
MutableContent content,
ContentRewriterFeature rewriterFeature) {
String sanitized = "";
try {
String contentType = response.getHeader("Content-Type");
if (contentType == null || contentType.toLowerCase().startsWith("text/")) {
SanitizingProxyingLinkRewriter cssImportRewriter =
sanitizingProxyingLinkRewriterFactory.create(
request.getGadget(),
rewriterFeature,
request.getContainer(),
"text/css",
false,
request.getIgnoreCache());
SanitizingProxyingLinkRewriter cssImageRewriter =
sanitizingProxyingLinkRewriterFactory.create(
request.getGadget(),
rewriterFeature,
request.getContainer(),
"image/*",
false,
request.getIgnoreCache());
sanitized =
cssSanitizer.sanitize(
content.getContent(), request.getUri(), cssImportRewriter, cssImageRewriter);
}
return true;
} finally {
// Set sanitized content in finally to ensure it is always cleared in
// the case of errors
content.setContent(sanitized);
}
}
