mirror of
https://github.com/fumiama/CMoe-Counter.git
synced 2024-11-30 16:24:28 +01:00
268 lines
8.1 KiB
C
268 lines
8.1 KiB
C
#include <simple_protobuf.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/file.h>
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#include <sys/uio.h>
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#include <unistd.h>
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#include "cmoe.h"
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static uint32_t* items_len;
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static counter_t counter;
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static char* datfile = "dat.sp";
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static char* token = "fumiama";
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static FILE* fp;
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#define ADD_HEADER_PARAM(buf, offset, h, p) sprintf(buf + offset, (h), (p))
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#define HEADER(content_type) HTTP200 SERVER_STRING CACHE_CTRL CONTENT_TYPE(content_type)
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#define headers(content_len, content_type) (_headers(content_len, HEADER(content_type), sizeof(HEADER(content_type))-1))
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static int _headers(uint32_t content_len, const char* h, size_t hlen) {
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char buf[64];
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size_t offset = ADD_HEADER_PARAM(buf, 0, CONTENT_LEN "\r\n", content_len);
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if(offset <= 0) return -1;
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content_len += offset+hlen;
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struct iovec iov[3] = {{&content_len, sizeof(uint32_t)}, {(void*)h, hlen}, {(void*)buf, offset}};
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return writev(1, (const struct iovec *)&iov, 3) <= 0;
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}
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static inline void http_error(errcode_enum_t code, char* msg) {
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uint32_t len = strlen(msg) + typel[code];
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char str[len];
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sprintf(str, types[code], msg);
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struct iovec iov[2] = {{(void*)&len, sizeof(uint32_t)}, {(void*)str, len}};
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writev(1, (const struct iovec *)&iov, 2);
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}
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// get_arg used malloc but has never freed
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static char* get_arg(const char* query) {
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int len = 0;
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while(query[len] && query[len] != '&') len++;
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if(len <= 0) return NULL;
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char* name = malloc(len+1);
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memcpy(name, query, len);
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name[len] = 0;
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return name;
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}
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static int del_user(FILE* fp, SIMPLE_PB* spb) {
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counter_t *d = (counter_t *)spb->target;
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uint32_t next = ftell(fp);
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uint32_t this = next - spb->real_len;
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fseek(fp, 0, SEEK_END);
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uint32_t end = ftell(fp);
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if(next == end) return ftruncate(fileno(fp), end - spb->real_len);
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uint32_t cap = end - next;
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char *data = malloc(cap);
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if(data) {
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fseek(fp, next, SEEK_SET);
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if(fread(data, cap, 1, fp) == 1) {
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if(!ftruncate(fileno(fp), end - spb->real_len)){
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fseek(fp, this, SEEK_SET);
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if(fwrite(data, cap, 1, fp) == 1) {
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free(data);
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fflush(fp);
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return 0;
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}
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}
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}
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free(data);
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}
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return 2;
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}
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static inline int add_user(char* name, uint32_t count, FILE* fp) {
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counter.count = count;
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strncpy(counter.name, name, COUNTER_NAME_LEN-1);
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fseek(fp, 0, SEEK_END);
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return !set_pb(fp, items_len, sizeof(counter_t), &counter);
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}
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static inline uint32_t get_content_len(int isbig, uint16_t* len_type, char* cntstr) {
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uint32_t len = sizeof(svg_small) // small & big has the same len
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+ sizeof(svg_tail) - 1;
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for(int i = 0; cntstr[i]; i++) {
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len += len_type[cntstr[i] - '0'] + (sizeof(img_slot_front) + sizeof(img_slot_rear) - 2);
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if(i > 0) len++;
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if(i > 2-isbig) len++;
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}
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return len;
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}
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#define has_next(fp, ch) ((ch=getc(fp)),(feof(fp)?0:(ungetc(ch,fp),1)))
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#define set_type(name, t, l) if(!strcmp(theme, name)) {\
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theme_type = (char**)t;\
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len_type = (uint16_t*)l;\
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}
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static void return_count(FILE* fp, char* name, char* theme) {
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int ch, exist = 0, user_exist = 0;
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char buf[sizeof(SIMPLE_PB)+sizeof(counter_t)];
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while(has_next(fp, ch)) {
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SIMPLE_PB *spb = read_pb_into(fp, (SIMPLE_PB*)buf);
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counter_t *d = (counter_t *)spb->target;
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if (strcmp(name, d->name)) continue;
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if(del_user(fp, spb)) {
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http_error(HTTP500, "Unable to Delete Old Data.");
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return;
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}
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if (add_user(d->name, d->count + 1, fp)) {
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http_error(HTTP500, "Add User Error.");
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return;
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}
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char cntstrbuf[11];
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sprintf(cntstrbuf, "%010u", d->count);
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char* cntstr = cntstrbuf;
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for(int i = 0; i < 10; i++) if(cntstrbuf[i] != '0') {
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if(i > 2) cntstr = cntstrbuf+i-2;
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break;
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}
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int isbig = 0;
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char** theme_type = (char**)mb;
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uint16_t* len_type = (uint16_t*)mbl;
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if(theme) {
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set_type("mbh", mbh, mbhl) else
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set_type("r34", r34, r34l) else
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set_type("gb", gb, gbl) else
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set_type("gbh", gbh, gbhl)
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isbig = (theme_type == (char**)gb || theme_type == (char**)gbh);
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}
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int w, h;
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char *head;
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if(isbig) {
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w = W_BIG;
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h = H_BIG;
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head = (char*)svg_big;
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}
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else {
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w = W_SMALL;
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h = H_SMALL;
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head = (char*)svg_small;
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}
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if(headers(get_content_len(isbig, len_type, cntstr), "image/svg+xml")) {
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write(1, "\0\0\0\0", 4);
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return;
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}
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printf(head, w*(10+cntstrbuf-cntstr));
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for(int i = 0; cntstr[i]; i++) {
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printf(img_slot_front, w * i, w, h);
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int n = cntstr[i] - '0';
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fwrite(theme_type[n], len_type[n], 1, stdout);
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printf(img_slot_rear);
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}
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printf(svg_tail);
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return;
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}
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http_error(HTTP404, "No Such User.");
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}
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static int name_exist(FILE* fp, char* name) {
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int ch, exist = 0;
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char buf[sizeof(SIMPLE_PB)+sizeof(counter_t)];
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while(has_next(fp, ch)) {
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SIMPLE_PB *spb = read_pb_into(fp, (SIMPLE_PB*)buf);
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counter_t *d = (counter_t *)spb->target;
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if (!strcmp(name, d->name)) return 1;
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}
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return 0;
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}
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#define create_or_open(fp, filename) ((fp = fopen(filename, "rb+"))?(fp):(fp = fopen(filename, "wb+")))
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#define QS (argv[2])
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// Usage: cmoe method query_string
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int main(int argc, char **argv) {
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if(argc != 3) {
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http_error(HTTP500, "Argument Count Error.");
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return -1;
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}
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char* str = getenv("DATFILE");
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if(str != NULL) datfile = str;
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str = getenv("TOKEN");
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if(str != NULL) token = str;
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char* name = strstr(QS, "name=");
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items_len = align_struct(sizeof(counter_t), 2, &counter.name, &counter.count);
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if(!items_len) {
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http_error(HTTP500, "Align Struct Error.");
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return 2;
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}
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if(!name) {
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http_error(HTTP400, "Name Argument Notfound.");
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return 3;
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}
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name = get_arg(name + 5);
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if(!name) {
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http_error(HTTP400, "Null Name Argument.");
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return 4;
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}
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char* theme = strstr(QS, "theme=");
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if(theme) {
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theme = get_arg(theme + 6);
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}
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char* reg = strstr(QS, "reg=");
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if (!reg) {
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if(!create_or_open(fp, datfile)) {
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http_error(HTTP500, "Open File Error.");
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return -2;
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}
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if(flock(fileno(fp), LOCK_EX)) {
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http_error(HTTP500, "Lock File Error.");
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return -3;
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}
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return_count(fp, name, theme);
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flock(fileno(fp), LOCK_UN);
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fclose(fp); fp = NULL;
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return 0;
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}
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reg = get_arg(reg + 4);
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if (!reg) {
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http_error(HTTP400, "Null Register Token.");
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return 5;
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}
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if(strcmp(reg, token)) {
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http_error(HTTP400, "Token Error.");
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return 6;
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}
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if(!create_or_open(fp, datfile)) {
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http_error(HTTP500, "Open File Error.");
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return -4;
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}
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if(flock(fileno(fp), LOCK_EX)) {
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http_error(HTTP500, "Lock File Error.");
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return -5;
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}
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if(name_exist(fp, name)) {
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flock(fileno(fp), LOCK_UN);
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fclose(fp); fp = NULL;
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http_error(HTTP400, "Name Exist.");
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return 7;
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}
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flock(fileno(fp), LOCK_UN);
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fclose(fp); fp = NULL;
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fp = fopen(datfile, "ab+");
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if (!fp) {
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http_error(HTTP500, "Open File Error.");
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return -6;
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}
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if(flock(fileno(fp), LOCK_EX)) {
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http_error(HTTP500, "Lock File Error.");
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return -7;
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}
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add_user(name, 0, fp);
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flock(fileno(fp), LOCK_UN);
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fclose(fp); fp = NULL;
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char* msg = "<P>Success.\r\n";
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if(headers(strlen(msg), "text/html")) {
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write(1, "\0\0\0\0", 4);
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return 8;
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}
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return write(1, msg, strlen(msg)) <= 0;
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}
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static void __attribute__((destructor)) defer_close_fp() {
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if(fp) {
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flock(fileno(fp), LOCK_UN);
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fclose(fp);
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}
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}
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