mirror of
https://github.com/lightpanda-io/browser.git
synced 2026-09-14 23:15:14 -04:00
Adrià Arrufat
11f38b9787
Expose `lp_last_error` and `lp_browser_last_error` in the C API to retrieve the error name of the most recent failing call.
61 lines
2.1 KiB
C
61 lines
2.1 KiB
C
/* Drive the browser through the tool surface: navigate, then extract the
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* page title and links via a selector schema.
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*
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* Build from the repo root after `make lib`, with the link line
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* documented in include/lightpanda.h. Run:
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* ./tools https://example.com
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*/
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#include <lightpanda.h>
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#include <stdio.h>
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#include <string.h>
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static lp_status call(lp_session *session, const char *tool, const char *args) {
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lp_result result = {0};
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lp_status status = lp_call(session, tool, strlen(tool), args, args ? strlen(args) : 0, &result);
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if (status != LP_OK) {
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size_t err_len = 0;
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const char *err = lp_last_error(session, &err_len);
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fprintf(stderr, "%s failed: %d (%.*s)\n", tool, status, (int)err_len, err ? err : "");
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return status;
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}
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printf("--- %s%s ---\n%.*s\n", tool, result.is_error ? " (page error)" : "", (int)result.len, result.text);
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return LP_OK;
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}
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int main(int argc, char **argv) {
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const char *url = argc > 1 ? argv[1] : "https://example.com";
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lp_browser *browser = NULL;
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if (lp_init(NULL, &browser) != LP_OK) {
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fprintf(stderr, "lp_init failed\n");
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return 1;
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}
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lp_session *session = NULL;
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if (lp_session_new(browser, &session) != LP_OK) {
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fprintf(stderr, "lp_session_new failed\n");
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lp_shutdown(browser);
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return 1;
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}
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char args[1024];
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snprintf(args, sizeof args, "{\"url\":\"%s\"}", url);
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lp_status status = call(session, "goto", args);
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/* extract's "schema" argument is a string holding a JSON object literal
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* that maps output fields to CSS-selector specs (not a JSON Schema). */
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if (status == LP_OK)
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status = call(session, "extract",
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"{\"schema\":"
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"\"{\\\"title\\\": \\\"title\\\","
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" \\\"links\\\": [{\\\"selector\\\": \\\"a\\\", \\\"attr\\\": \\\"href\\\"}]}\""
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"}");
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if (status == LP_OK)
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status = call(session, "getUrl", NULL);
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lp_session_close(session);
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lp_shutdown(browser);
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return status == LP_OK ? 0 : 1;
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}
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