commit 36e19e43c3eb4717bb5f1b32752d4f32812204b3 Author: DogeyStamp Date: Mon Aug 2 11:41:15 2021 -0400 Initial commit diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..286e71a --- /dev/null +++ b/.gitignore @@ -0,0 +1,3 @@ +*.o +minrss +config.h diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..f288702 --- /dev/null +++ b/LICENSE @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..f069425 --- /dev/null +++ b/Makefile @@ -0,0 +1,34 @@ +SRC = minrss.c util.c net.c xml.c +OBJ = $(SRC:.c=.o) +CC = cc +INCS = +LIBS = -lcurl -I/usr/include/libxml2 -lxml2 -lm +WARN = -Wall -Wpedantic -Wextra +CFLAGS = $(LIBS) $(INCS) $(WARN) + +PREFIX = /usr/local + +all: config.h minrss + +debug: CFLAGS += -g3 +debug: config.h minrss + +config.h: + cp config.def.h config.h + +.c.o: + $(CC) $(CFLAGS) -c $< + +minrss: $(OBJ) + $(CC) $(CFLAGS) -o $@ $(OBJ) + +clean: + rm -f minrss $(OBJ) + +install: all + mkdir -p $(DESTDIR)$(PREFIX)/bin + cp -f minrss $(DESTDIR)$(PREFIX)/bin + chmod 755 $(DESTDIR)$(PREFIX)/bin/minrss + +uninstall: + rm -f $(DESTDIR)$(PREFIX)/bin/minrss diff --git a/README b/README new file mode 100644 index 0000000..8c3c430 --- /dev/null +++ b/README @@ -0,0 +1,35 @@ +MinRSS +====== +MinRSS (minimal RSS) is an RSS feed reader inspired by suckless.org's +IRC clients ii and sic. Instead of presenting RSS articles as entries +in a menu, it saves them as files in folders. + +rss +|--news +| |--article1 +| `--article2 +`--blog + |--post + `--other_post + +Requirements +------------ +You need libcurl and libxml2 to compile MinRSS. + +Installation +------------ +Run this command as root to build MinRSS: + + make clean install + +Configuration +------------- +MinRSS is configured via the config.h file, which you can create by +either compiling MinRSS for the first time or copying config.def.h +to it. To save your changes, recompile MinRSS. + +Using MinRSS +------------ +Make a directory to store you RSS feeds, then cd into it. Then, enter +the minrss command to download the RSS feeds. Your feeds will be +available as folders in your current working directory. diff --git a/config.def.h b/config.def.h new file mode 100644 index 0000000..8c53976 --- /dev/null +++ b/config.def.h @@ -0,0 +1,36 @@ +typedef struct { + const char *url; + const char *feedName; + const char *tags; +} linkStruct; + +/* Example link: + { + .url = "https://example.com/rss/feed.rss", + // This will be used as the folder name for the feed. + .feedName = "examplefeed", + .tags = "test example sample" + }, +*/ + +static const linkStruct links[] = { + { + .url = "", + .feedName = "", + .tags = "" + }, +}; + +/* + * 0: Fatal errors + * 1: Errors + * 2: Warnings + * 3: Info messages + * 4: Verbose mode +*/ + +static const int logLevel = 3; + +// Set the maximum amount of redirects curl will follow. +// Use 0 to disable redirects, and -1 for no limit. +static const int maxRedirs = 10; diff --git a/minrss.c b/minrss.c new file mode 100644 index 0000000..fd8c44c --- /dev/null +++ b/minrss.c @@ -0,0 +1,112 @@ +#include +#include +#include +#include + +#include "config.h" +#include "util.h" +#include "net.h" +#include "xml.h" + +void +itemAction(itemStruct *item, const char *folder) +{ + itemStruct *cur = item; + + unsigned long long int newItems = 0; + + while (cur) { + char *filePath; + char *fileName = san(cur->title, 1); + itemStruct *prev = cur; + + if (fileName[0]) + filePath = ecalloc( + strlen(folder) + strlen(fileName) + 2, + sizeof(char)); + else { + logMsg(1, "Invalid article title.\n"); + + cur = cur->next; + freeItem(prev); + + continue; + } + + strcpy(filePath, folder); + + unsigned long long int ind = strlen(filePath); + filePath[ind] = fsep(); + filePath[ind + 1] = '\0'; + + strcat(filePath, fileName); + free(fileName); + + FILE *itemFile = fopen(filePath, "a"); + free(filePath); + + // Do not overwrite files + if (!ftell(itemFile)) { + newItems++; + + fprintf(itemFile, "%s\n\n", cur->title); + fprintf(itemFile, "%s\n", san(cur->description, 0)); + fprintf(itemFile, "%s\n", san(cur->link, 0)); + } + + fclose(itemFile); + + cur = cur->next; + freeItem(prev); + } + + if (newItems) + logMsg(2, "%d new articles for feed %s.\n", newItems, folder); +} + +void +finish(char *url, long responseCode) +{ + if (responseCode == 200) + logMsg(4, "Finished downloading %s\n", url); + else if (!responseCode) + logMsg(1, "Can not reach %s\n", url); + else + logMsg(1, "HTTP %ld for %s\n", responseCode, url); +} + +int +main() +{ + unsigned int i = 0; + + initCurl(); + + outputStruct outputs[LEN(links)]; + memset(outputs, 0, sizeof(outputs)); + + for (i = 0; i < LEN(links); i++) { + if (links[0].url[0] == '\0') + logMsg(0, "No feeds, add them in config.def.h\n"); + + logMsg(4, "Requesting %s\n", links[i].url); + createRequest(links[i].url, &outputs[i]); + } + + performRequests(finish); + + logMsg(3, "Finished downloads.\n"); + + for (i = 0; i < LEN(links); i++) { + logMsg(4, "Parsing %s\n", links[i].url); + + if (outputs[i].buffer && outputs[i].buffer[0]) { + readDoc(outputs[i].buffer, links[i].feedName, itemAction); + free(outputs[i].buffer); + } + } + + logMsg(3, "Finished parsing feeds.\n"); + + return 0; +} diff --git a/net.c b/net.c new file mode 100644 index 0000000..52d18c4 --- /dev/null +++ b/net.c @@ -0,0 +1,110 @@ +#include +#include +#include +#include + +#include "net.h" +#include "util.h" +#include "config.h" + +static CURLM *multiHandle; + +int +initCurl() +{ + curl_global_init(CURL_GLOBAL_ALL); + multiHandle = curl_multi_init(); + + return !multiHandle; +} + +static size_t +writeCallback(void *ptr, size_t size, size_t nmemb, void *data) +{ + size_t realsize = size * nmemb; + + outputStruct *mem = (outputStruct*) data; + + mem->buffer = realloc(mem->buffer, mem->size + realsize + 1); + + if (mem->buffer) { + memcpy(&(mem->buffer[mem->size]), ptr, realsize); + + mem->size += realsize; + mem->buffer[mem->size] = 0; + } + + return realsize; +} + +int +createRequest(const char* url, outputStruct *output) +{ + CURL *requestHandle = curl_easy_init(); + + if (!requestHandle) + logMsg(0, "Can't initialise curl.\n"); + + output->buffer = NULL; + output->size = 0; + + CURLcode stat; + if (curl_easy_setopt(requestHandle, CURLOPT_URL, url)) { + logMsg(1, "Invalid URL: %s\n", url); + } + + stat = curl_easy_setopt(requestHandle, CURLOPT_WRITEFUNCTION, writeCallback); + stat = curl_easy_setopt(requestHandle, CURLOPT_WRITEDATA, (void*)output); + stat = curl_easy_setopt(requestHandle, CURLOPT_MAXREDIRS, maxRedirs); + stat = curl_easy_setopt(requestHandle, CURLOPT_FOLLOWLOCATION, 1L); + + if (stat) { + fprintf(stderr, "Unexpected curl error: %s.\n", curl_easy_strerror(stat)); + return 1; + } + + CURLMcode multiStat = curl_multi_add_handle(multiHandle, requestHandle); + if (multiStat) { + fprintf(stderr, "Unexpected curl error: %s.\n", curl_multi_strerror(multiStat)); + return 1; + } + + return 0; +} + +int +performRequests(void callback(char *, long)) +{ + int runningRequests; + + do { + curl_multi_wait(multiHandle, NULL, 0, 1000, NULL); + curl_multi_perform(multiHandle, &runningRequests); + + CURLMsg* msg; + + int queueMsgs; + + while ((msg = curl_multi_info_read(multiHandle, &queueMsgs))) { + if (msg->msg == CURLMSG_DONE) { + CURL *requestHandle = msg->easy_handle; + + char *url = NULL; + long responseCode = 0; + + curl_easy_getinfo(requestHandle, CURLINFO_EFFECTIVE_URL, &url); + curl_easy_getinfo(requestHandle, CURLINFO_RESPONSE_CODE, &responseCode); + + callback(url, responseCode); + + curl_multi_remove_handle(multiHandle, requestHandle); + curl_easy_cleanup(requestHandle); + } + } + // > 0 because curl puts negative numbers when there's broken requests + } while (runningRequests > 0); + + curl_multi_cleanup(multiHandle); + + return 0; +} diff --git a/net.h b/net.h new file mode 100644 index 0000000..2de5f11 --- /dev/null +++ b/net.h @@ -0,0 +1,10 @@ +#include + +typedef struct { + char *buffer; + size_t size; +} outputStruct; + +int initCurl(); +int createRequest(const char *url, outputStruct *output); +int performRequests(void callback(char *, long)); diff --git a/util.c b/util.c new file mode 100644 index 0000000..c5cf462 --- /dev/null +++ b/util.c @@ -0,0 +1,84 @@ +#include +#include +#include +#include +#include + +#include "config.h" + +void +logMsg(int lvl, char *msg, ...) +{ + va_list args; + va_start(args, msg); + + if (lvl <= logLevel) + vfprintf(stderr, msg, args); + + va_end(args); + + if (!lvl) + exit(1); +} + +void * +ecalloc(size_t nmemb, size_t size) +{ + void *p = calloc(nmemb, size); + + if (!p) + logMsg(0, "Error allocating memory.\n"); + + return p; +} + +void * +erealloc(void *p, size_t size) +{ + p = realloc(p, size); + + if (!p) + logMsg(0, "Error reallocating memory.\n"); + + return p; +} + +char * +san(char *str, int rep) +{ + if (!str) + return ""; + if (!rep) + return str; + + unsigned long long int len = strlen(str); + unsigned long long int offset = 0; + + char *dup = ecalloc(len + 1, sizeof(char)); + strcpy(dup, str); + + for (unsigned long long int i = 0; i < len; i++) { + if ((dup[i] >= 'a' && dup[i] <= 'z') || + (dup[i] >= 'A' && dup[i] <= 'Z') || + (dup[i] >= '0' && dup[i] <= '9') || + dup[i] == '-' || dup[i] == '_') + dup[i - offset] = dup[i]; + else if (dup[i] == ' ') + dup[i - offset] = '_'; + else + offset++; + } + + dup[len-offset] = '\0'; + + return dup; +} + +char fsep() +{ +#ifdef _WIN32 + return '\\'; +#else + return '/'; +#endif +} diff --git a/util.h b/util.h new file mode 100644 index 0000000..9739e82 --- /dev/null +++ b/util.h @@ -0,0 +1,7 @@ +#define LEN(X) (sizeof(X) / sizeof(X[0])) + +void logMsg(int argc, char *msg, ...); +void *ecalloc(size_t nmemb, size_t size); +void *erealloc(void *p, size_t nmemb); +char *san(char *str, int rep); +char fsep(); diff --git a/xml.c b/xml.c new file mode 100644 index 0000000..0a8cc13 --- /dev/null +++ b/xml.c @@ -0,0 +1,200 @@ +#include +#include +#include +#include +#include +#include +#include + +#include "util.h" +#include "xml.h" + +#define TAGIS(X, Y) (!xmlStrcmp(X->name, (const xmlChar *) Y)) + +void +freeItem(itemStruct *item) +{ + char **mems[] = { + &item->title, + &item->link, + &item->description, + &item->author, + &item->comments, + &item->guid, + &item->pubDate, + &item->sourceName, + &item->sourceUrl, + &item->categories, + &item->enclosureUrl, + &item->enclosureType, + }; + + for (unsigned long int i = 0; i < LEN(mems); i++) { + if (*mems[i]) + free(*mems[i]); + } + + free(item); +} + +static int +parseXml(xmlDocPtr doc, + const char *feedName, + void itemAction(itemStruct *, const char *)) +{ + if (!feedName || !feedName[0]) { + logMsg(1, "Missing feed name, please set one.\n"); + return 1; + } + + xmlNodePtr rootNode; + + rootNode = xmlDocGetRootElement(doc); + + if (!rootNode) { + logMsg(1, "Empty document for feed. Skipping...\n"); + return 1; + } + + if (!TAGIS(rootNode, "rss")) { + logMsg(1, "XML document is not an RSS feed. Skipping...\n"); + return 1; + } + + xmlChar *key; + + // Get channel XML tag + xmlNodePtr channel = rootNode->children; + + while(channel && !TAGIS(channel, "channel")) + channel = channel->next; + + if (!channel || !TAGIS(channel, "channel")) { + logMsg(1, "Invalid RSS syntax. Skipping...\n"); + } + + xmlNodePtr cur = channel->children; + + itemStruct *prev = NULL; + + while (cur) { + + key = xmlNodeListGetString(doc, cur->children, 1); + + if (TAGIS(cur, "item")) { + itemStruct *item = ecalloc(1, sizeof(itemStruct)); + + item->next = prev; + prev = item; + + xmlNodePtr itemNode = cur->children; + + while (itemNode) { + char *itemKey = (char *)xmlNodeListGetString(doc, itemNode->children, 1); + + char *attKeys[] = { + "title", + "link", + "description", + "author", + "comments", + "guid", + "pubDate", + "source" + }; + char **atts[] = { + &item->title, + &item->link, + &item->description, + &item->author, + &item->comments, + &item->guid, + &item->pubDate, + &item->sourceName, + }; + + if (itemKey) { + for (unsigned long int i = 0; i < LEN(attKeys); i++) { + if (TAGIS(itemNode, attKeys[i])) { + *atts[i] = ecalloc(strlen(itemKey) + 1, sizeof(char)); + + strcpy(*atts[i], itemKey); + } + } + + if (TAGIS(itemNode, "category")) { + if (item->categories) { + erealloc(item->categories, + strlen(item->categories) + strlen(itemKey) + 2); + + strcat(item->categories, " "); + strcat(item->categories, itemKey); + } + else { + item->categories = ecalloc( + strlen(itemKey) + 2, + sizeof(char)); + strcpy(item->categories, itemKey); + } + } + + if (TAGIS(itemNode, "enclosure")) { + item->enclosureUrl = + (char *) xmlGetProp(itemNode, (xmlChar *) "url"); + item->enclosureType = + (char *) xmlGetProp(itemNode, (xmlChar *) "type"); + + char *endPtr; + errno = 0; + + item->enclosureLen = strtoul( + (char *) xmlGetProp(itemNode, (xmlChar *) "length"), + &endPtr, + 10); + + if (errno) + logMsg(1, "Invalid RSS: enclosure length is invalid.\n"); + } + xmlFree(itemKey); + } + + itemNode = itemNode->next; + } + } + + xmlFree(key); + cur = cur->next; + } + + errno = 0; + int stat = mkdir((const char* ) feedName, S_IRWXU); + + if (!stat && errno && errno != EEXIST) { + logMsg(1, "Error creating directory for feed.\n"); + return 1; + } + + itemAction(prev, feedName); + + return 0; +} + +int +readDoc(char *content, + const char *feedName, + void itemAction(itemStruct *, const char *)) +{ + xmlDocPtr doc; + + doc = xmlReadMemory(content, strlen(content), "noname.xml", NULL, 0); + if (!doc) { + logMsg(1, "XML parser error.\n"); + return 1; + } + + int stat = parseXml(doc, feedName, itemAction); + + xmlFreeDoc(doc); + + return stat; +} diff --git a/xml.h b/xml.h new file mode 100644 index 0000000..09756c5 --- /dev/null +++ b/xml.h @@ -0,0 +1,24 @@ +typedef struct itemStruct itemStruct; +struct itemStruct { + char *title; + char *link; + char *description; + char *author; + char *categories; + char *comments; + char *enclosureUrl; + char *enclosureType; + unsigned long long enclosureLen; + char *guid; + char *pubDate; + char *sourceName; + char *sourceUrl; + itemStruct *next; +}; + +void freeItem(itemStruct *item); + +int readDoc( + char *content, + const char *feedName, + void itemAction(itemStruct *, char const *chanTitle));