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File: //usr/local/src/uploadprogress/uploadprogress.c
/*
  +----------------------------------------------------------------------+
  | Uploadprogress extension                                             |
  +----------------------------------------------------------------------+
  | Copyright (c) The PHP Group                                          |
  +----------------------------------------------------------------------+
  | This source file is subject to version 3.01 of the PHP license,      |
  | that is bundled with this package in the file LICENSE, and is        |
  | available through the world-wide-web at the following url:           |
  | http://www.php.net/license/3_01.txt.                                 |
  | If you did not receive a copy of the PHP license and are unable to   |
  | obtain it through the world-wide-web, please send a note to          |
  | license@php.net so we can mail you a copy immediately.               |
  +----------------------------------------------------------------------+
  | Author: Christian Stocker (chregu@liip.ch)                           |
  |  Derived from: Doru Petrescu (pdoru-php-upm@kappa.ro)                |
  |                http://pdoru.from.ro/upload-progress-meter/           |
  +----------------------------------------------------------------------+
*/

#include "php_uploadprogress.h"
#include "rfc1867.h"

#if HAVE_UPLOADPROGRESS

#ifdef P_tmpdir
#define TMPDIR P_tmpdir
#else
#define TMPDIR "/tmp"
#endif

/* {{{ uploadprogress_functions[] */
zend_function_entry uploadprogress_functions[] = {
    PHP_FE(uploadprogress_get_info, NULL)
    PHP_FE(uploadprogress_get_contents, NULL)
    { NULL, NULL, NULL }
};
/* }}} */

PHP_INI_BEGIN()
PHP_INI_ENTRY("uploadprogress.file.filename_template", TMPDIR"/upt_%s.txt",         PHP_INI_ALL, NULL)
PHP_INI_ENTRY("uploadprogress.file.contents_template", TMPDIR"/upload_contents_%s", PHP_INI_ALL, NULL)
PHP_INI_ENTRY("uploadprogress.get_contents",           "0",                         PHP_INI_ALL, NULL)
PHP_INI_END()

/* {{{ uploadprogress_module_entry
*/
zend_module_entry uploadprogress_module_entry = {
    STANDARD_MODULE_HEADER,
    "uploadprogress",
    uploadprogress_functions,
    PHP_MINIT(uploadprogress),
    PHP_MSHUTDOWN(uploadprogress),
    PHP_RINIT(uploadprogress),
    PHP_RSHUTDOWN(uploadprogress),
    PHP_MINFO(uploadprogress),
    PHP_UPLOADPROGRESS_VERSION,
    STANDARD_MODULE_PROPERTIES
};
/* }}} */

#ifdef COMPILE_DL_UPLOADPROGRESS
ZEND_GET_MODULE(uploadprogress)
#endif

#if PHP_API_VERSION >= 20190128
PHPAPI extern int (*php_rfc1867_callback)(unsigned int , void *, void **);
#else
PHPAPI extern int (*php_rfc1867_callback)(unsigned int , void *, void ** TSRMLS_DC);
#endif

/* {{{ uploadprogress_php_rfc1867_file
 */
#if PHP_API_VERSION >= 20190128
static int uploadprogress_php_rfc1867_file(unsigned int event, void  *event_data, void **data)
#else
static int uploadprogress_php_rfc1867_file(unsigned int event, void  *event_data, void **data TSRMLS_DC)
#endif
{
    uploadprogress_data *progress;
    int read_bytes;
    zend_bool get_contents = INI_BOOL("uploadprogress.get_contents");

    progress = *data;

    if (event == MULTIPART_EVENT_START) {
        multipart_event_start  *e_data;
        e_data = (multipart_event_start*) event_data;
        progress = emalloc(sizeof(uploadprogress_data));
        progress->upload_id = NULL;
        progress->fieldname = NULL;
        progress->data_filename = NULL;
        progress->bytes_total = e_data->content_length;
        progress->identifier = NULL;
        progress->identifier_tmp = NULL;
        progress->time_start = time(NULL);
        *data = progress;
    } else if (event == MULTIPART_EVENT_FORMDATA) {
        multipart_event_formdata *e_data;
        e_data = (multipart_event_formdata*) event_data;
        read_bytes = e_data->post_bytes_processed;

        if (e_data->newlength) {
            *e_data->newlength = e_data->length;
        }

        if (strcmp(e_data->name, "UPLOAD_IDENTIFIER") == 0)  {
            char **upload_id;
            char *template = INI_STR("uploadprogress.file.filename_template");

            if (strcmp(template, "") == 0)  {
                return FAILURE;
            }

            upload_id = emalloc(strlen(*e_data->value) + 1);
            strcpy(*upload_id, *e_data->value);

            progress->upload_id = *upload_id;
            progress->time_last = time(NULL);
            progress->speed_average = 0;
            progress->speed_last = 0;
            progress->bytes_uploaded = read_bytes;
            progress->files_uploaded = 0;
            progress->est_sec = 0;
            progress->identifier = uploadprogress_mk_filename(*upload_id, template);
            progress->identifier_tmp = emalloc(strlen( progress->identifier) + 4);
            sprintf(progress->identifier_tmp, "%s.wr", progress->identifier);

            if (upload_id) {
                efree(upload_id);
            }
        }
    }

    if (progress->identifier) {
        time_t crtime = time(NULL);
        int d, dt, ds;

        if (event == MULTIPART_EVENT_FILE_START) {
            char *data_identifier;
            multipart_event_file_start *e_data;

            e_data = (multipart_event_file_start*) event_data;
            read_bytes = e_data->post_bytes_processed;

            progress->fieldname = e_data->name;
            progress->filename = *e_data->filename;

            data_identifier = emalloc(strlen(progress->upload_id) + strlen(progress->fieldname) + 2);
            sprintf(data_identifier, "%s-%s", progress->upload_id, progress->fieldname);

            if (get_contents) {
                char *data_template = INI_STR("uploadprogress.file.contents_template");

                if (strcmp(data_template, "") == 0) {
                    return FAILURE;
                }

                progress->data_filename = uploadprogress_mk_filename(data_identifier, data_template);
            }

            if (data_identifier) {
                efree(data_identifier);
            }
        } else if (event == MULTIPART_EVENT_FILE_DATA) {
            multipart_event_file_data *e_data;

            e_data = (multipart_event_file_data*) event_data;
            read_bytes = e_data->post_bytes_processed;

            if (get_contents) {
                php_stream *stream;
#if defined(ZEND_ENGINE_3)
                int options = 0;
#else
                int options = ENFORCE_SAFE_MODE;
#endif

                stream = php_stream_open_wrapper(progress->data_filename, "ab", options, NULL);

                if (stream) {
                    php_stream_write(stream, e_data->data, e_data->length);
                }

                php_stream_close(stream);
            }
        } else if (event == MULTIPART_EVENT_FILE_END) {
            multipart_event_file_end *e_data;

            e_data = (multipart_event_file_end*) event_data;

            read_bytes = e_data->post_bytes_processed;
            progress->files_uploaded++;

            if (get_contents) {
                VCWD_UNLINK(progress->data_filename);
                efree(progress->data_filename);
            }
        } else if (event == MULTIPART_EVENT_END) {
            VCWD_UNLINK(progress->identifier);
            efree(progress->identifier);
            efree(progress->identifier_tmp);
            efree(progress);

            return SUCCESS;
        }

        /* Just in case we encounter a fracture in time. */
        if (progress->time_last > crtime) {
            progress->time_last = crtime;
        }

        dt = crtime - progress->time_last;
        ds = crtime - progress->time_start;
        d = read_bytes - progress->bytes_uploaded;

        if (dt) {
            progress->speed_last = d/dt;
            progress->time_last = crtime;
            progress->bytes_uploaded = read_bytes;
            progress->speed_average = ds ? read_bytes / ds : 0;
            progress->est_sec = progress->speed_average ? (progress->bytes_total - read_bytes) / progress->speed_average : -1;
        }

        if (dt || event >= MULTIPART_EVENT_FILE_END) {
            FILE *F;

            F = VCWD_FOPEN(progress->identifier_tmp, "wb");

            if (F) {
                fprintf(F,
                        "upload_id=%s\nfieldname=%s\nfilename=%s\ntime_start=%ld\n"
                            "time_last=%ld\nspeed_average=%u\nspeed_last=%u\n"
                            "bytes_uploaded=%lu\nbytes_total=%lu\n"
                            "files_uploaded=%u\nest_sec=%d\n",
                        progress->upload_id,
                        progress->fieldname,
                        progress->filename,
                        progress->time_start,
                        progress->time_last,
                        progress->speed_average,
                        progress->speed_last,
                        progress->bytes_uploaded,
                        progress->bytes_total,
                        progress->files_uploaded,
                        progress->est_sec);

                fclose(F);

/* VCWD_RENAME on WIN32 and PHP < 5.3 has a bug, if target does exist */
#ifdef PHP_WIN32
#if PHP_MAJOR_VERSION == 5 && PHP_MINOR_VERSION < 3
                VCWD_UNLINK(progress->identifier);
#endif
#endif

                VCWD_RENAME(progress->identifier_tmp, progress->identifier);
            }
        }
    }

    if (event == MULTIPART_EVENT_END ) {
        if (progress->identifier) {
            efree(progress->identifier);
        }

        if (progress->identifier_tmp) {
            efree(progress->identifier_tmp);
        }

        if (get_contents && progress->data_filename) {
            efree(progress->data_filename);
        }

        efree(progress);
    }

    return SUCCESS;
}
/* }}} */

/* {{{ PHP_MINIT_FUNCTION */
PHP_MINIT_FUNCTION(uploadprogress)
{
    REGISTER_INI_ENTRIES();
    php_rfc1867_callback = uploadprogress_php_rfc1867_file;

    return SUCCESS;
}
/* }}} */

/* {{{ PHP_MSHUTDOWN_FUNCTION */
PHP_MSHUTDOWN_FUNCTION(uploadprogress)
{
    UNREGISTER_INI_ENTRIES();
    php_rfc1867_callback = NULL;

    return SUCCESS;
}
/* }}} */

/* {{{ PHP_RINIT_FUNCTION */
PHP_RINIT_FUNCTION(uploadprogress)
{
    return SUCCESS;
}
/* }}} */

/* {{{ PHP_RSHUTDOWN_FUNCTION */
PHP_RSHUTDOWN_FUNCTION(uploadprogress)
{
    return SUCCESS;
}
/* }}} */

/* {{{ PHP_MINFO_FUNCTION */
PHP_MINFO_FUNCTION(uploadprogress)
{
    php_info_print_table_start();
    php_info_print_table_header(2, "uploadprogress support", "enabled");
    php_info_print_table_row(2, "Version",  PHP_UPLOADPROGRESS_VERSION);
    php_info_print_table_end();
    DISPLAY_INI_ENTRIES();
}
/* }}} */

/* {{{ proto array uploadprogress_get_info(string identifier)
 */
PHP_FUNCTION(uploadprogress_get_info)
{
    char *id;
#if defined(ZEND_ENGINE_3)
    size_t id_lg;
#else
    int id_lg;
#endif

#if PHP_API_VERSION >= 20190128
    if (zend_parse_parameters(ZEND_NUM_ARGS(), "s", &id, &id_lg) == FAILURE) {
#else
    if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &id, &id_lg) == FAILURE) {
#endif
        return;
    }

    uploadprogress_file_php_get_info(id, return_value);

    return;
}
/* }}} */

/* {{{ proto string uploadprogress_get_contents(string identifier, string fieldname[, int maxlen])
 */
PHP_FUNCTION(uploadprogress_get_contents)
{
    char *id, *fieldname;
#if defined(ZEND_ENGINE_3)
    size_t id_len, fieldname_len;
#else
    int id_len, fieldname_len;
#endif
    long maxlen = PHP_STREAM_COPY_ALL;
    zend_bool get_contents = INI_BOOL("uploadprogress.get_contents");

    if (!get_contents) {
#if PHP_API_VERSION >= 20190128
        php_error_docref(NULL, E_WARNING,
                         "this function is disabled; set uploadprogress.get_contents = On to enable it");
#else
        php_error_docref(NULL TSRMLS_CC, E_WARNING,
                         "this function is disabled; set uploadprogress.get_contents = On to enable it");
#endif
        RETURN_FALSE;

        return;
    }

#if PHP_API_VERSION >= 20190128
    if (zend_parse_parameters(ZEND_NUM_ARGS(), "ss|l",
                              &id, &id_len, &fieldname, &fieldname_len, &maxlen) == FAILURE) {
#else
    if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ss|l",
                              &id, &id_len, &fieldname, &fieldname_len, &maxlen) == FAILURE) {
#endif
        return;
    }

    if (ZEND_NUM_ARGS() == 3 && maxlen < 0) {
#if PHP_API_VERSION >= 20190128
        php_error_docref(NULL, E_WARNING, "length must be greater than or equal to zero");
#else
        php_error_docref(NULL TSRMLS_CC, E_WARNING, "length must be greater than or equal to zero");
#endif
        RETURN_FALSE;
    }

    uploadprogress_file_php_get_contents(id, fieldname, maxlen, return_value);
    return;
}
/* }}} */

/* {{{ uploadprogress_mk_filename
 */
static char *uploadprogress_mk_filename(char *identifier, char *template)
{
    char *x;
    char *filename;

    filename = emalloc(strlen(template) + strlen(identifier) + 3);
    x = strstr(template, "%s");

    if (x == NULL) {
        sprintf(filename, "%s/%s", template, identifier);
    } else {
        strcpy(filename, template);
        strcpy(filename + (x - template), identifier);
        strcat(filename, x + 2);
    }

    return filename;
}
/* }}} */

/* {{{ uploadprogress_file_php_get_info
 */
static void uploadprogress_file_php_get_info(char *id, zval *return_value)
{
    char s[1024];
    char *filename;
    char *template;
    FILE *F;
#if PHP_API_VERSION < 20190128
    TSRMLS_FETCH();
#endif

    template = INI_STR("uploadprogress.file.filename_template");

    if (strcmp(template, "") == 0)  {
        return;
    } else {
        filename = uploadprogress_mk_filename(id, template);

        if (!filename) {
            return;
        }

        F = VCWD_FOPEN(filename, "rb");

        if (F) {
            array_init(return_value);

            while (fgets(s, 1000, F)) {
                char *k, *v, *e;
                int index = 0;

                e = strchr(s, '=');

                if (!e) {
                    continue;
                }

                /* Break the line into 2 parts. */
                *e = 0;
                v = e + 1;
                k = s;

                /* Trim spaces in front of the name/value. */
                while (*k && *k <= 32) {
                    k++;
                }

                while (*v && *v <= 32) {
                    v++;
                }

                /* Trim spaces everywhere in the name. */
                for (e = k; *e; e++) {
                    if (*e <= 32) {
                        *e = 0;
                        break;
                    }
                }

                /* Trim spaces only at the end of the value. */
                if (v != NULL) {
                    for (index = strlen(v); index > 0; index--) {
                        if (v[index] > 32) {
                            break;
                        }

                        v[index] = 0;
                    }
                }

#if defined(ZEND_ENGINE_3)
                add_assoc_string(return_value, k, v);
#else
                add_assoc_string(return_value, k, v, 1);
#endif
            }

            fclose(F);
        }

        if (filename) {
            efree(filename);
        }

        return;
    }
}
/* }}} */

/* {{{ uploadprogress_file_php_get_contents
 */
static void uploadprogress_file_php_get_contents(char *id, char *fieldname, long maxlen, zval *return_value)
{
#if defined(ZEND_ENGINE_3)
    char *filename, *template, *data_identifier;
    zend_string *contents;
    int options = 0;
    size_t len;
#else
    char *filename, *template, *contents, *data_identifier;
    int options = ENFORCE_SAFE_MODE;
    int len;
#endif
    php_stream *stream;
#if PHP_API_VERSION < 20100412
    int newlen;
#endif
#if PHP_API_VERSION < 20190128
    TSRMLS_FETCH();
#endif

    template = INI_STR("uploadprogress.file.contents_template");

    if (strcmp(template, "") == 0) {
        return;
    } else {
        data_identifier = emalloc(strlen(id) + strlen(fieldname) + 2);
        sprintf(data_identifier, "%s-%s", id, fieldname);

        filename = uploadprogress_mk_filename(data_identifier, template);

        if (!filename) {
            if (data_identifier) {
                efree(data_identifier);
            }

            return;
        }

        stream = php_stream_open_wrapper(filename, "rb", options, NULL);

        if (!stream) {
            if (data_identifier) {
                efree(data_identifier);
            }

            if (filename) {
                efree(filename);
            }

            RETURN_FALSE;
        }

        /* Uses mmap if possible. */
#if defined(ZEND_ENGINE_3)
        contents = php_stream_copy_to_mem(stream, maxlen, 0);

        if (contents) {
            len = contents->len;
        }

        if (contents && len > 0) {
#else
        if ((len = php_stream_copy_to_mem(stream, &contents, maxlen, 0)) > 0) {
#endif

#if PHP_API_VERSION < 20100412
            if (PG(magic_quotes_runtime)) {
                contents = php_addslashes(contents, len, &newlen, 1 TSRMLS_CC);
                len = newlen;
            }
#endif
#if defined(ZEND_ENGINE_3)
            RETVAL_STR(contents);
#else
            RETVAL_STRINGL(contents, len, 0);
#endif
        } else {
            RETVAL_EMPTY_STRING();
        }

        php_stream_close(stream);

        if (data_identifier) {
            efree(data_identifier);
        }

        if (filename) {
            efree(filename);
        }

        return;
    }
}
/* }}} */

#endif /* HAVE_UPLOADPROGRESS */