Readline: add trivial OpenRPC support
So far hidden under a switch and only for this frontend.
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667b01cb73
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GPG Key ID:
A0420B94F92B9493
114
json-rpc-shell.c
114
json-rpc-shell.c
@ -268,6 +268,8 @@ input_rl_on_startup (void)
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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static char **app_readline_completion (const char *text, int start, int end);
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static void
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input_rl_start (struct input *input, const char *program_name)
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{
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@ -282,6 +284,8 @@ input_rl_start (struct input *input, const char *program_name)
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rl_catch_sigwinch = false;
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rl_change_environment = false;
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rl_attempted_completion_function = app_readline_completion;
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hard_assert (self->prompt != NULL);
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rl_callback_handler_install (self->prompt, input_rl_on_input);
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@ -663,6 +667,8 @@ input_el_start (struct input *input, const char *program_name)
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"run-editor", "Run editor to edit line", input_el_on_run_editor);
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el_set (self->editline, EL_BIND, "M-e", "run-editor", NULL);
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// TODO: implement method name completion for editline (see degesch)
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// Source the user's defaults file
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el_source (self->editline, NULL);
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@ -940,12 +946,14 @@ static struct app_context
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struct backend *backend; ///< Our current backend
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char *editor_filename; ///< File for input line editor
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struct str_map methods; ///< Methods detected via OpenRPC
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struct config config; ///< Program configuration
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enum color_mode color_mode; ///< Colour output mode
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bool compact; ///< Whether to not pretty print
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bool verbose; ///< Print requests
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bool trust_all; ///< Don't verify peer certificates
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bool openrpc; ///< OpenRPC method name completion
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bool null_as_id; ///< JSON null is used as an ID
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int64_t next_id; ///< Next autogenerated ID
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@ -2891,13 +2899,18 @@ maybe_print_verbose (struct app_context *ctx, intptr_t attribute,
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char *term = iconv_xstrdup (ctx->term_from_utf8, utf8, len, NULL);
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if (!term)
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print_error ("%s: %s", "verbose", "character conversion failed");
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else
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{
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print_attributed (ctx, stdout, attribute, "%s", term);
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fputs ("\n", stdout);
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free (term);
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print_error ("%s: %s", "verbose", "character conversion failed");
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return;
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}
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ctx->input->vtable->hide (ctx->input);
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print_attributed (ctx, stdout, attribute, "%s", term);
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fputs ("\n", stdout);
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free (term);
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ctx->input->vtable->show (ctx->input);
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}
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static struct error *
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@ -3081,7 +3094,90 @@ fail:
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free (input);
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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// --- OpenRPC information extraction ------------------------------------------
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static void
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init_openrpc (struct app_context *ctx)
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{
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if (!ctx->openrpc)
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return;
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json_t *id = json_integer (ctx->next_id++);
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struct str buf = str_make ();
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struct error *e = json_rpc_call_raw (ctx, "rpc.discover", id, NULL, &buf);
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json_decref (id);
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// Just optimistically punch through, I don't have time for this shit
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json_error_t error;
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json_t *response = NULL, *result = NULL, *value = NULL;
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if (!e && !(response = json_loadb (buf.str, buf.len, 0, &error)))
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error_set (&e, "parse failure: %s", error.text);
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else if (!(result = json_object_get (response, "result"))
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|| !(result = json_object_get (result, "methods")))
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error_set (&e, "unsupported");
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else
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{
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const char *name = NULL;
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for (size_t i = 0; (value = json_array_get (result, i)); i++)
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if ((value = json_object_get (value, "name"))
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&& (name = json_string_value (value)))
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str_map_set (&ctx->methods, name, (void *) 1);
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}
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json_decref (response);
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if (e)
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{
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print_error ("OpenRPC: %s", e->message);
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error_free (e);
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}
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str_free (&buf);
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}
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// --- GNU Readline user actions -----------------------------------------------
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#ifdef HAVE_READLINE
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static char *
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app_readline_complete (const char *text, int state)
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{
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static struct str_map_iter iter;
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if (!state)
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iter = str_map_iter_make (&g_ctx.methods);
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char *input;
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size_t len;
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if (!(input = iconv_xstrdup (g_ctx.term_to_utf8, (char *) text, -1, &len)))
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{
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print_error ("character conversion failed for `%s'", "user input");
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return NULL;
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}
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char *match = NULL;
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while (str_map_iter_next (&iter)
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&& (strncasecmp_ascii (input, iter.link->key, len - 1 /* XXX */)
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|| !(match = iconv_xstrdup (g_ctx.term_from_utf8,
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iter.link->key, iter.link->key_length + 1, NULL))))
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;
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free (input);
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return match;
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}
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static char **
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app_readline_completion (const char *text, int start, int end)
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{
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(void) end;
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// Only customize matches for the first token, which is the method name
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if (start)
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return NULL;
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// Don't iterate over filenames and stuff in this case
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rl_attempted_completion_over = true;
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return rl_completion_matches (text, app_readline_complete);
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}
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#endif // HAVE_READLINE
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// --- Main program ------------------------------------------------------------
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// The ability to use an external editor on the input line has been shamelessly
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// copypasted from degesch with minor changes only.
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@ -3366,6 +3462,8 @@ parse_program_arguments (struct app_context *ctx, int argc, char **argv,
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"colorize output: never, always, or auto" },
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{ 'n', "null-as-id", NULL, 0, "JSON null is used as an `id'" },
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{ 'o', "origin", "O", 0, "set the HTTP Origin header" },
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// So far you have to explicitly enable this rather than disable
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{ 'O', "openrpc", NULL, 0, "method name completion using OpenRPC" },
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{ 't', "trust-all", NULL, 0, "don't care about SSL/TLS certificates" },
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{ 'v', "verbose", NULL, 0, "print raw requests and responses" },
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{ 'w', "write-default-cfg", "FILENAME",
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@ -3395,6 +3493,7 @@ parse_program_arguments (struct app_context *ctx, int argc, char **argv,
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exit (EXIT_SUCCESS);
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case 'o': *origin = optarg; break;
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case 'O': ctx->openrpc = true; break;
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case 'n': ctx->null_as_id = true; break;
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case 'c': ctx->compact = true; break;
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case 't': ctx->trust_all = true; break;
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@ -3452,6 +3551,7 @@ main (int argc, char *argv[])
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g_ctx.input->on_input = process_input;
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g_ctx.input->on_run_editor = run_editor;
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g_ctx.methods = str_map_make (NULL);
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init_colors (&g_ctx);
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load_configuration (&g_ctx);
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@ -3531,6 +3631,7 @@ main (int argc, char *argv[])
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g_ctx.input->vtable->start (g_ctx.input, PROGRAM_NAME);
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ev_set_userdata (EV_DEFAULT_ &g_ctx);
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init_openrpc (&g_ctx);
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ev_run (EV_DEFAULT_ 0);
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// User has terminated the program, let's save the history and clean up
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@ -3553,6 +3654,7 @@ main (int argc, char *argv[])
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iconv_close (g_ctx.term_from_utf8);
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iconv_close (g_ctx.term_to_utf8);
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str_map_free (&g_ctx.methods);
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config_free (&g_ctx.config);
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free_terminal ();
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ev_loop_destroy (EV_DEFAULT);
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