From ca59138a2aef96960381f986b8c683634e4d8e63 Mon Sep 17 00:00:00 2001 From: NunoSempere Date: Tue, 28 Mar 2023 11:18:54 -0600 Subject: tweak: move things around --- src/plugins/libre_redirect/README.md | 3 + src/plugins/libre_redirect/libre_redirect.c | 84 ++++++++++++++++++++++ src/plugins/libre_redirect/libre_redirect.h | 6 ++ src/plugins/libre_redirect/str_replace_start.c | 65 +++++++++++++++++ src/plugins/libre_redirect/str_replace_start.h | 4 ++ .../str_replace_test/build-example.sh | 11 +++ .../libre_redirect/str_replace_test/example.c | 19 +++++ 7 files changed, 192 insertions(+) create mode 100644 src/plugins/libre_redirect/README.md create mode 100644 src/plugins/libre_redirect/libre_redirect.c create mode 100644 src/plugins/libre_redirect/libre_redirect.h create mode 100644 src/plugins/libre_redirect/str_replace_start.c create mode 100644 src/plugins/libre_redirect/str_replace_start.h create mode 100644 src/plugins/libre_redirect/str_replace_test/build-example.sh create mode 100644 src/plugins/libre_redirect/str_replace_test/example.c (limited to 'src/plugins/libre_redirect') diff --git a/src/plugins/libre_redirect/README.md b/src/plugins/libre_redirect/README.md new file mode 100644 index 0000000..f3f58c9 --- /dev/null +++ b/src/plugins/libre_redirect/README.md @@ -0,0 +1,3 @@ +## About + +This code automatically redirects webpage to their open-source frontends. It is based on \ No newline at end of file diff --git a/src/plugins/libre_redirect/libre_redirect.c b/src/plugins/libre_redirect/libre_redirect.c new file mode 100644 index 0000000..3794add --- /dev/null +++ b/src/plugins/libre_redirect/libre_redirect.c @@ -0,0 +1,84 @@ +#include +#include +#include + +#include "str_replace_start.h" + +#define LIBRE_N 19 + +/* Uncomment for debug */ +/* #define DEBUG */ + +/* Inspired by https://libredirect.github.io/, but in C. */ + +void str_init(char* str, int n) +{ + for (int i = 0; i < n; i++) + str[i] = ' '; + str[n] = '\0'; +} // could also use + +int libre_redirect(const char* uri, char* output) +{ + int l1 = strlen(uri); + int l2 = strlen(output); + int len; + char tmp_uri[l2++]; + char tmp_output[l2++]; + + if ((l2 - l1) < LIBRE_N) { +#ifdef DEBUG + printf("Not enough memory\n"); +#endif + return 1; // not enough memory. + } else { + strcpy(tmp_uri, uri); // strcpy also copies the terminating '\0' + strcpy(tmp_output, output); + + char* annoying_sites[] = { + "https://www.youtube.com", + "https://www.reddit.com", + "https://medium.com", + "https://translate.google.com", + // "https://forum.effectivealtruism.org", + "https://www.bloomberg.com", + "https://twitter.com" + }; + + char* alternatives[] = { + "https://yt.artemislena.eu", + "https://teddit.nunosempere.com", + "https://scribe.rip", + "https://simplytranslate.org/", + // "https://ea.greaterwrong.com", + "https://archive.is/https://www.bloomberg.com", + "https://nitter.net" + }; + + len = sizeof(annoying_sites) / sizeof(annoying_sites[0]); + + for (int i = 0; i < len; i++) { + int replace_check = str_replace_start(tmp_uri, annoying_sites[i], + alternatives[i], output); + if (replace_check == 2) { +#ifdef DEBUG + printf("tmp_uri: %s\n", tmp_uri); + printf("output: %s\n", output); +#endif + return 2; + } else if (replace_check == 1) { +#ifdef DEBUG + printf("replace_check failed\n"); +#endif + return 1; + } + strcpy(tmp_uri, output); + str_init(output, l2); + } + strcpy(output, tmp_uri); + } +#ifdef DEBUG + printf("No match found\n\n"); +#endif + return 0; +} diff --git a/src/plugins/libre_redirect/libre_redirect.h b/src/plugins/libre_redirect/libre_redirect.h new file mode 100644 index 0000000..150c95e --- /dev/null +++ b/src/plugins/libre_redirect/libre_redirect.h @@ -0,0 +1,6 @@ +#pragma once + +#define LIBRE_N 19 + +int libre_redirect(const char* uri, char* uri_filtered); +void str_init(char* str, int n); diff --git a/src/plugins/libre_redirect/str_replace_start.c b/src/plugins/libre_redirect/str_replace_start.c new file mode 100644 index 0000000..d1fe083 --- /dev/null +++ b/src/plugins/libre_redirect/str_replace_start.c @@ -0,0 +1,65 @@ +#include +#include +#include + +#define DEBUG false + +/* +See also: +* +* https://github.com/irl/la-cucina/blob/master/str_replace.c +*/ + +int str_replace_start(const char* string, const char* target, const char* replacement, char* output) +{ + int l1 = strlen(string); + int l2 = strlen(target); + int l3 = strlen(replacement); + int l4 = strlen(output); + if (DEBUG) + printf("%d,%d,%d,%d\n", l1, l2, l3, l4); + // if(DEBUG) printf("%s,%s,%s,%s\n", string, target, replacement, output); + + if ((l4 < (l1 - l2 + l3)) || l4 < l1) { + // Not enough memory in output string. + if (DEBUG) + printf("String not long enough.\n"); + return 1; + } + /* else if(l1 < l2){ + // Not even possible that there is a match. + if(DEBUG) printf("Target larger than string.\n"); + strcpy(output, string); + } */ + else { + if (DEBUG) + printf("Looking for a match for %s in %s.\n", target, string); + int match = true; + for (int i = 0; i < l2; i++) { + if (string[i] != target[i]) { + match = false; + break; + } + } + if (match) { + if (DEBUG) + printf("Found match.\n"); + for (int i = 0; i < l3; i++) { + output[i] = replacement[i]; + } + int counter = l3; + for (int i = l2; i < l1; i++) { + output[counter] = string[i]; + counter++; + } + output[counter] = '\0'; + return 2; // success + } else { + if (DEBUG) + printf("Did not find match.\n"); + strcpy(output, string); + } + } + + return 0; +} diff --git a/src/plugins/libre_redirect/str_replace_start.h b/src/plugins/libre_redirect/str_replace_start.h new file mode 100644 index 0000000..78c79b5 --- /dev/null +++ b/src/plugins/libre_redirect/str_replace_start.h @@ -0,0 +1,4 @@ +#pragma once + +int str_replace_start(const char* string, const char* target, + const char* replacement, char* output); diff --git a/src/plugins/libre_redirect/str_replace_test/build-example.sh b/src/plugins/libre_redirect/str_replace_test/build-example.sh new file mode 100644 index 0000000..a9f8022 --- /dev/null +++ b/src/plugins/libre_redirect/str_replace_test/build-example.sh @@ -0,0 +1,11 @@ +#!/bin/bash +CC=gcc + +FLAGS="-std=c99 -Wall -lm" + +SRC=example.c +REQS="../str_replace_start.c ../libre_redirect.c" + +echo -e "\n\n\n" +$CC $FLAGS $SRC $REQS -o example + diff --git a/src/plugins/libre_redirect/str_replace_test/example.c b/src/plugins/libre_redirect/str_replace_test/example.c new file mode 100644 index 0000000..b93634a --- /dev/null +++ b/src/plugins/libre_redirect/str_replace_test/example.c @@ -0,0 +1,19 @@ +#include "../libre_redirect.h" +#include +#include + +int main() +{ + char uri[] = "https://reddit.com/r/blah"; + + int l = LIBRE_N + strlen(uri) + 1; + char uri_filtered[l]; + str_init(uri_filtered, l); + + if (!libre_redirect(uri, uri_filtered)) { + printf("Filtered uri: %s\n", uri_filtered); + } else { + printf("Uri: %s\n", uri); + // failure; do something with the original uri. + } +} -- cgit v1.2.3