From 8ef310a22a54dca7a80947f83f03bc296ab298dd Mon Sep 17 00:00:00 2001
From: Aleksey Veresov <aleksey@veresov.pro>
Date: Tue, 4 Feb 2020 18:14:54 +0300
Subject: [magi]

---
 src/multipart.c | 479 --------------------------------------------------------
 1 file changed, 479 deletions(-)
 delete mode 100644 src/multipart.c

(limited to 'src/multipart.c')

diff --git a/src/multipart.c b/src/multipart.c
deleted file mode 100644
index 7b829d8..0000000
--- a/src/multipart.c
+++ /dev/null
@@ -1,479 +0,0 @@
-/* Support for multifile controls are not provided. */
-#include "multipart.h"
-
-#include "error.h"
-#include "param.h"
-#include "utils.h"
-#include <ctype.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
- * Local Shortcuts
- */
-static int is_token(char c)
-{
-    return 32 <= c && c <= 126 && !strchr("()<>@,;:\\\"/[]?={} \t", c);
-}
-
-static int is_str_token(char * str)
-{
-    int is = str && *str; /* Empty string is not valid. */
-    while (is && *str) {
-        is = is_token(*str);
-        ++str;
-    }
-    return is;
-}
-
-
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
- * Automata for multipart/form-data
- */
-enum st {
-    st_error = 0,
-    st_begin,
-    st_pname_pre,
-    st_pname,
-    st_pname_end,
-    st_pdata,
-    st_data,
-    st_end
-};
-
-struct automata {
-    struct magi_request * request;
-    struct magi_file      file;
-    struct magi_param     param;
-    struct magi_param     subparam;
-    char *                buf;
-    int                   buf_size;
-    int                   size;
-    int                   len;
-    char *                boundary;
-    int                   boundary_pos;
-    int                   boundary_len;
-    int                   is_end_suspected;
-    int                   is_CR_readed;
-    int                   is_quoted;
-    int                   readed;
-};
-
-
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
- * Automata Shortcuts
- */
-static char * extract_filename(char * n)
-{
-    n = strchr(n, '=');
-    if (!n) {
-        return 0;
-    }
-    n += strspn(n, " \t") + 1;
-    if (*n == '"') {
-        ++n;
-        return magi_str_create_copy(n, strchr(n, '"'));
-    } else {
-        return magi_str_create_copy(n, n + strcspn(n, " \t"));
-    }
-}
-
-static int content_disposition(struct automata * a)
-{
-    char * n = strchr(a->subparam.data, '=');
-    if (!n) {
-        return 0;
-    }
-    n += strspn(n, " \t") + 1;
-    if (*n == '"') {
-        ++n;
-        a->param.name = magi_str_create_copy(n, strchr(n, '"'));
-        if (!a->param.name || !*a->param.name) {
-            return 0;
-        }
-    } else {
-        a->param.name = magi_str_create_copy(n, n + strcspn(n, " \t"));
-        if (!a->param.name || !is_str_token(a->param.name)) {
-            return 0;
-        }
-    }
-    a->file.file_name = extract_filename(n);
-    if (a->file.file_name) {
-        a->file.param_name = a->param.name;
-        a->file.params     = 0;
-        a->param.name      = 0;
-    }
-    free(a->subparam.name);
-    free(a->subparam.data);
-    a->subparam.name = 0;
-    a->subparam.data = 0;
-    return 1;
-}
-
-static int subparam_end(struct automata * a)
-{
-    a->size = 1;
-    a->len  = 0;
-    magi_str_lowercase(a->subparam.name);
-    if (!strcmp(a->subparam.name, "content-disposition")) {
-        return content_disposition(a);
-    } else if (magi_param_list_add(&a->file.params, &a->subparam)) {
-        a->subparam.name = 0;
-        a->subparam.data = 0;
-        return 1;
-    }
-    return 0;
-}
-
-static int param_end(struct automata * a)
-{
-    if (a->file.file_name) {
-        a->request->file_callback(&a->file, a->buf, a->buf_size, 1,
-                                  a->request->file_callback_userdata);
-        a->readed -= a->buf_size;
-        a->buf_size = 0;
-        if (!magi_file_list_add(&a->request->files, &a->file)) {
-            free(a->file.file_name);
-            free(a->file.param_name);
-            magi_param_list_destroy(a->file.params);
-            free(a->file.params);
-            a->request->error = magi_error_multipart;
-            return 0;
-        }
-        a->file.file_name  = 0;
-        a->file.param_name = 0;
-        a->file.params     = 0;
-        a->size            = 1;
-        a->len             = 0;
-        return 1;
-    }
-    if (!a->param.name) {
-        a->request->error = magi_error_multipart;
-        return 0;
-    }
-    if (!magi_param_list_add(&a->request->params, &a->param)) {
-        free(a->param.name);
-        free(a->param.data);
-        a->request->error = magi_error_multipart;
-        return 0;
-    }
-    a->param.name = 0;
-    a->param.data = 0;
-    a->size       = 1;
-    a->len        = 0;
-    return 1;
-}
-
-
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
- * Boundary Interfaces
- */
-static char sepget(const struct automata * a)
-{
-    char      c;
-    const int pos_after = a->boundary_pos - 4 - a->boundary_len;
-    if (a->boundary_pos == 0) {
-        c = '\r';
-    } else if (a->boundary_pos == 1) {
-        c = '\n';
-    } else if (a->boundary_pos == 2 || a->boundary_pos == 3) {
-        c = '-';
-    } else if (a->boundary_pos - 4 < a->boundary_len) {
-        c = a->boundary[a->boundary_pos - 4];
-    } else if (pos_after == 0) {
-        c = '\r';
-    } else if (pos_after == 1) {
-        c = '\n';
-    } else {
-        c = 0;
-    }
-    return c;
-}
-
-static int seplen(const struct automata * a)
-{
-    return a->boundary_len + 6;
-}
-
-static char endget(const struct automata * a)
-{
-    char      c;
-    const int pos_after = a->boundary_pos - 4 - a->boundary_len;
-    if (a->boundary_pos == 0) {
-        c = '\r';
-    } else if (a->boundary_pos == 1) {
-        c = '\n';
-    } else if (a->boundary_pos == 2 || a->boundary_pos == 3) {
-        c = '-';
-    } else if (a->boundary_pos - 4 < a->boundary_len) {
-        c = a->boundary[a->boundary_pos - 4];
-    } else if (pos_after == 0 || pos_after == 1) {
-        c = '-';
-    } else if (pos_after == 2) {
-        c = '\r';
-    } else if (pos_after == 3) {
-        c = '\n';
-    } else {
-        c = 0;
-    }
-    return c;
-}
-
-static int endlen(const struct automata * a)
-{
-    return a->boundary_len + 8;
-}
-
-static int is_semiend(const struct automata * a)
-{ /* Is end readed, expect last two chars, which are CR LF? */
-    return a->is_end_suspected && (a->boundary_pos == endlen(a) - 2);
-}
-
-
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
- * Data Reading
- */
-static void apply_callback(struct automata * a)
-{
-    int full = a->buf_size == a->request->file_callback_addon_max;
-    if (a->file.file_name && full) {
-        a->request->file_callback(&a->file, a->buf, a->buf_size, 0,
-                                  a->request->file_callback_userdata);
-        a->readed -= a->buf_size;
-        a->buf_size = 0;
-    }
-}
-
-static enum st data_add_act(
-    struct automata * a, char c, char ** dest, int * len, int * size)
-{
-    int pos = a->boundary_pos;
-    for (a->boundary_pos = 0; a->boundary_pos < pos; ++a->boundary_pos) {
-        if (a->is_end_suspected) {
-            magi_str_add(dest, len, size, endget(a));
-        } else {
-            magi_str_add(dest, len, size, sepget(a));
-        }
-        apply_callback(a);
-    }
-    a->boundary_pos     = 0;
-    a->is_end_suspected = 0;
-
-    if (sepget(a) != c) {
-        magi_str_add(dest, len, size, c);
-        apply_callback(a);
-        return st_data;
-    } else {
-        a->boundary_pos++;
-        if (a->boundary_pos == seplen(a)) {
-            param_end(a);
-            return st_pname_pre;
-        }
-        return st_data;
-    }
-}
-
-static enum st data_add(struct automata * a, char c)
-{
-    if (a->file.file_name) {
-        int max = a->request->file_callback_addon_max + 1;
-        return data_add_act(a, c, &a->buf, &a->buf_size, &max);
-    } else {
-        return data_add_act(a, c, &a->param.data, &a->len, &a->size);
-    }
-}
-
-
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
- * State analysers
- */
-static enum st parse_begin(struct automata * a, char c)
-{
-    if (sepget(a) != c) {    /* 'c' is not wanted character from separator; */
-        a->boundary_pos = 0; /* so nullify progress in reading separator. */
-    } else {
-        a->boundary_pos++;
-        if (a->boundary_pos == seplen(a)) {
-            return st_pname_pre; /* Separator is completed, so move on. */
-        }
-    }
-    return st_begin;
-}
-
-static enum st parse_pname_pre(struct automata * a, char c)
-{
-    if (a->is_CR_readed) {
-        if (c != '\n') {
-            return st_error;
-        }
-        a->is_CR_readed = 0;
-        a->boundary_pos = 0;
-        return st_data;
-    } else if (c == '\r') {
-        a->is_CR_readed = 1;
-        return st_pname_pre;
-    } else if (is_token(c) &&
-               magi_str_add(&a->subparam.name, &a->len, &a->size, c)) {
-        return st_pname;
-    }
-    return st_error;
-}
-
-static enum st parse_pname(struct automata * a, char c)
-{
-    if (c == ':') {
-        a->len  = 0;
-        a->size = 1;
-        return st_pdata;
-    } else if (c == ' ' || c == '\t') {
-        return st_pname_end;
-    } else if (is_token(c) &&
-               magi_str_add(&a->subparam.name, &a->len, &a->size, c)) {
-        return st_pname;
-    }
-    return st_error;
-}
-
-static enum st parse_pname_end(struct automata * a, char c)
-{
-    if (c == ':') {
-        a->len  = 0;
-        a->size = 1;
-        return st_pdata;
-    } else if (c == ' ' || c == '\t') {
-        return st_pname_end;
-    }
-    return st_error;
-}
-
-static enum st parse_pdata(struct automata * a, char c)
-{
-    if (a->is_CR_readed) {
-        a->is_CR_readed = 0;
-        if (c == '\n') {
-            if (subparam_end(a)) {
-                return st_pname_pre;
-            }
-            return st_error;
-        } else if (magi_str_add(&a->subparam.data, &a->len, &a->size, '\r') &&
-                   magi_str_add(&a->subparam.data, &a->len, &a->size, c)) {
-            return st_pdata;
-        }
-        return st_error;
-    } else if (c == '\r') {
-        a->is_CR_readed = 1;
-        return st_pdata;
-    } else if (magi_str_add(&a->subparam.data, &a->len, &a->size, c)) {
-        return st_pdata;
-    }
-    return st_error;
-}
-
-static enum st parse_data(struct automata * a, char c)
-{
-    if (a->is_end_suspected) {
-        if (endget(a) != c) {
-            return data_add(a, c);
-        }
-        a->boundary_pos++;
-        if (a->boundary_pos == endlen(a)) {
-            param_end(a);
-            return st_end;
-        }
-        return st_data;
-    } else if (sepget(a) == c) {
-        a->boundary_pos++;
-        if (a->boundary_pos == seplen(a)) {
-            param_end(a);
-            return st_pname_pre;
-        }
-        return st_data;
-    } else if ((a->boundary_pos == seplen(a) - 2) && endget(a) == c) {
-        a->is_end_suspected = 1;
-        a->boundary_pos++;
-        return st_data;
-    }
-    return data_add(a, c);
-}
-
-static enum st parse_end(struct automata * a, char c)
-{
-    return st_end;
-}
-
-
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
- * Automata Runner
- */
-static void run_automata(struct automata * a,
-                         int (*next)(void * next_userdata),
-                         void * next_userdata)
-{
-    enum st state = st_begin;
-    int     c     = next(next_userdata);
-    while (state && state != st_end && c != EOF &&
-           (!a->request->params_max || a->readed != a->request->params_max)) {
-        switch (state) {
-        case st_begin:
-            state = parse_begin(a, c);
-            break;
-        case st_pname_pre:
-            state = parse_pname_pre(a, c);
-            break;
-        case st_pname:
-            state = parse_pname(a, c);
-            break;
-        case st_pname_end:
-            state = parse_pname_end(a, c);
-            break;
-        case st_pdata:
-            state = parse_pdata(a, c);
-            break;
-        case st_data:
-            state = parse_data(a, c);
-            break;
-        case st_end:
-            state = parse_end(a, c);
-        default:
-            break;
-        }
-        c = next(next_userdata);
-        ++a->readed;
-    }
-    if (a->request->params_max && a->readed == a->request->params_max) {
-        a->request->error = magi_error_limit;
-        return;
-    }
-    if (state == st_data && is_semiend(a)) {
-        state = st_end;
-        param_end(a);
-    }
-    if (state != st_end) {
-        a->request->error = magi_error_multipart;
-        free(a->subparam.name);
-        free(a->subparam.data);
-    }
-}
-
-
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
- * Automata Interfaces
- */
-void magi_multipart(struct magi_request * request,
-                    char *                boundary,
-                    int (*next)(void * userdata),
-                    void * next_userdata)
-{
-    struct automata a = { 0, { 0, 0, 0 }, { 0, 0 }, { 0, 0 }, 0, 0, 1,
-                          0, 0,           2,        0,        0, 0, 0 };
-    a.request         = request;
-    a.boundary        = boundary;
-    a.boundary_len    = strlen(boundary);
-    a.buf             = malloc(request->file_callback_addon_max + 1);
-    if (a.buf) {
-        run_automata(&a, next, next_userdata);
-        free(a.buf);
-    }
-}
-- 
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