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29 calls to drupal_add_http_header() in Drupal 7

aggregator_test_feed in modules/aggregator/tests/aggregator_test.module
Page callback. Generates a test feed and simulates last-modified and etags.
ajax_deliver in includes/ajax.inc
Packages and sends the result of a page callback as an Ajax response.
ajax_set_verification_header in includes/ajax.inc
Sets a response header for ajax.js to trust the response body.
authorize_access_denied_page in ./authorize.php
Renders a 403 access denied page for authorize.php.
drupal_deliver_html_page in includes/common.inc
Packages and sends the result of a page callback to the browser as HTML.
drupal_fast_404 in includes/bootstrap.inc
Returns a simple 404 Not Found page.
drupal_json_output in includes/common.inc
Returns data in JSON format.
drupal_serve_page_from_cache in includes/bootstrap.inc
Sets HTTP headers in preparation for a cached page response.
existing_interest_cohort_policy in modules/simpletest/tests/common_test.module
Page callback.
existing_permissions_policy_header in modules/simpletest/tests/common_test.module
Page callback.
file_transfer in includes/file.inc
Transfers a file to the client using HTTP.
image_style_deliver in modules/image/image.module
Page callback: Generates a derivative, given a style and image path.
node_feed in modules/node/node.module
Generates and prints an RSS feed.
openid_test_yadis_xrds in modules/openid/tests/openid_test.module
Menu callback; XRDS document that references the OP Endpoint URL.
openid_test_yadis_x_xrds_location in modules/openid/tests/openid_test.module
Menu callback; regular HTML page with an X-XRDS-Location HTTP header.
system_test_set_header in modules/simpletest/tests/system_test.module
theme_aggregator_page_opml in modules/aggregator/aggregator.pages.inc
Prints the OPML page for the feed.
theme_aggregator_page_rss in modules/aggregator/aggregator.pages.inc
Prints the RSS page for a feed.
theme_install_page in includes/theme.maintenance.inc
Returns HTML for the installation page.
theme_update_page in includes/theme.maintenance.inc
Returns HTML for the update page.
update_access_denied_page in ./update.php
Renders a 403 access denied page for update.php.
update_callback_service_unavailable in modules/update/tests/update_test.module
Page callback: Displays an Error 503 (Service unavailable) page.
user_login_final_validate in modules/user/user.module
The final validation handler on the login form.
user_pass_reset in modules/user/user.pages.inc
Menu callback; process one time login link and redirects to the user page on success.
xmlrpc_server_output in includes/xmlrpcs.inc
Sends XML-RPC output to the browser.
_drupal_exception_handler in includes/bootstrap.inc
Provides custom PHP exception handling.
_drupal_log_error in includes/errors.inc
Logs a PHP error or exception and displays an error page in fatal cases.
_openid_test_endpoint_associate in modules/openid/tests/openid_test.module
OpenID endpoint; handle "associate" requests (see OpenID Authentication 2.0, section 8).
_openid_test_endpoint_authenticate in modules/openid/tests/openid_test.module
OpenID endpoint; handle "authenticate" requests.