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ESP_Mail_IMAP.h
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ESP_Mail_IMAP.h
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#ifndef ESP_MAIL_IMAP_H
#define ESP_MAIL_IMAP_H
#include "ESP_Mail_Client_Version.h"
#if !VALID_VERSION_CHECK(30415)
#error "Mixed versions compilation."
#endif
/**
* Mail Client Arduino Library for Espressif's ESP32 and ESP8266, Raspberry Pi RP2040 Pico, and SAMD21 with u-blox NINA-W102 WiFi/Bluetooth module
*
* Created August 28, 2023
*
* This library allows Espressif's ESP32, ESP8266, SAMD and RP2040 Pico devices to send and read Email through the SMTP and IMAP servers.
*
* The MIT License (MIT)
* Copyright (c) 2023 K. Suwatchai (Mobizt)
*
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "ESP_Mail_Client_Version.h"
#include "ESP_Mail_Client.h"
#if defined(ENABLE_IMAP)
#if defined(MB_ARDUINO_PICO)
extern uint8_t _FS_start;
extern uint8_t _FS_end;
#endif
int ESP_Mail_Client::decodeChar(const char *s)
{
return 16 * hexval(*(s + 1)) + hexval(*(s + 2));
}
void ESP_Mail_Client::decodeQP_UTF8(const char *buf, char *out)
{
char *tmp = strP(esp_mail_str_47 /* "0123456789ABCDEF" */);
int idx = 0;
while (*buf)
{
if (*buf != '=')
out[idx++] = *buf++;
else if (*(buf + 1) == '\r' && *(buf + 2) == '\n')
buf += 3;
else if (*(buf + 1) == '\n')
buf += 2;
else if (!strchr(tmp, *(buf + 1)))
out[idx++] = *buf++;
else if (!strchr(tmp, *(buf + 2)))
out[idx++] = *buf++;
else
{
out[idx++] = decodeChar(buf);
buf += 3;
}
}
// release memory
freeMem(&tmp);
}
char *ESP_Mail_Client::decode7Bit_UTF8(char *buf)
{
MB_String s;
// only non NULL and 7-bit ASCII are allowed
// rfc2045 section 2.7
size_t len = buf ? strlen(buf) : 0;
for (size_t i = 0; i < len; i++)
{
if (buf[i] > 0 && buf[i] < 128 && i < 998)
s.append(1, buf[i]);
}
// some special chars can't send in 7bit unless encoded as queoted printable string
char *decoded = allocMem<char *>(s.length() + 10);
decodeQP_UTF8(s.c_str(), decoded);
s.clear();
return decoded;
}
char *ESP_Mail_Client::decode8Bit_UTF8(char *buf)
{
MB_String s;
// only non NULL and less than 998 octet length are allowed
// rfc2045 section 2.8
size_t len = buf ? strlen(buf) : 0;
for (size_t i = 0; i < len; i++)
{
if (buf[i] > 0 && i < 998)
s.append(1, buf[i]);
}
char *decoded = allocMem<char *>(s.length() + 1);
strcpy(decoded, s.c_str());
s.clear();
return decoded;
}
void ESP_Mail_Client::decodeString(IMAPSession *imap, MB_String &str, const char *enc)
{
size_t p1 = 0, p2 = 0;
MB_String headerEnc;
if (strlen(enc) == 0)
{
while (str[p1] == ' ' && p1 < str.length() - 1)
p1++;
if (str[p1] == '=' && str[p1 + 1] == '?')
{
p2 = str.find('?', p1 + 2);
if (p2 != MB_String::npos)
headerEnc = str.substr(p1 + 2, p2 - p1 - 2);
}
}
else
headerEnc = enc;
int bufSize = str.length() + 10;
char *buf = allocMem<char *>(bufSize);
// Content Q and B decodings
RFC2047Decoder.decode(mbfs, buf, str.c_str(), bufSize);
// Char set decoding
esp_mail_char_decoding_scheme scheme = getEncodingFromCharset(headerEnc.c_str());
if (imap->_charDecCallback)
{
IMAP_Decoding_Info decoding;
decoding.charset = headerEnc.c_str();
decoding.data = buf;
decoding.type = IMAP_Decoding_Info::message_part_type_header;
imap->_charDecCallback(&decoding);
if (decoding.decodedString.length() > 0)
{
char *buf2 = allocMem<char *>(decoding.decodedString.length() + 1);
strcpy(buf2, decoding.decodedString.c_str());
// release memory and point to new buffer
freeMem(&buf);
buf = buf2;
}
}
else if (scheme == esp_mail_char_decoding_scheme_iso8859_1)
{
int len = strlen(buf);
int olen = (len + 1) * 2;
unsigned char *out = allocMem<unsigned char *>(olen);
decodeLatin1_UTF8(out, &olen, (unsigned char *)buf, &len);
// release memory and point to new buffer
freeMem(&buf);
buf = (char *)out;
}
else if (scheme == esp_mail_char_decoding_scheme_tis_620 || scheme == esp_mail_char_decoding_scheme_iso8859_11 || scheme == esp_mail_char_decoding_scheme_windows_874)
{
size_t len2 = strlen(buf);
char *tmp = allocMem<char *>((len2 + 1) * 3);
decodeTIS620_UTF8(tmp, buf, len2);
// release memory and point to new buffer
freeMem(&buf);
buf = tmp;
}
str = buf;
// release memory
freeMem(&buf);
}
esp_mail_char_decoding_scheme ESP_Mail_Client::getEncodingFromCharset(const char *enc)
{
esp_mail_char_decoding_scheme scheme = esp_mail_char_decoding_scheme_default;
for (int i = esp_mail_char_decoding_utf8; i < esp_mail_char_decoding_maxType; i++)
{
if (strpos(enc, char_decodings[i].text, 0, false) > -1)
scheme = (esp_mail_char_decoding_scheme)i;
}
return scheme;
}
int ESP_Mail_Client::encodeUnicode_UTF8(char *out, uint32_t utf)
{
if (utf <= 0x7F)
{
// Plain ASCII
out[0] = (char)utf;
out[1] = 0;
return 1;
}
else if (utf <= 0x07FF)
{
// 2-byte unicode
out[0] = (char)(((utf >> 6) & 0x1F) | 0xC0);
out[1] = (char)(((utf >> 0) & 0x3F) | 0x80);
out[2] = 0;
return 2;
}
else if (utf <= 0xFFFF)
{
// 3-byte unicode
out[0] = (char)(((utf >> 12) & 0x0F) | 0xE0);
out[1] = (char)(((utf >> 6) & 0x3F) | 0x80);
out[2] = (char)(((utf >> 0) & 0x3F) | 0x80);
out[3] = 0;
return 3;
}
else if (utf <= 0x10FFFF)
{
// 4-byte unicode
out[0] = (char)(((utf >> 18) & 0x07) | 0xF0);
out[1] = (char)(((utf >> 12) & 0x3F) | 0x80);
out[2] = (char)(((utf >> 6) & 0x3F) | 0x80);
out[3] = (char)(((utf >> 0) & 0x3F) | 0x80);
out[4] = 0;
return 4;
}
else
{
// error - use replacement character
out[0] = (char)0xEF;
out[1] = (char)0xBF;
out[2] = (char)0xBD;
out[3] = 0;
return 0;
}
}
void ESP_Mail_Client::decodeTIS620_UTF8(char *out, const char *in, size_t len)
{
// output is the 3-byte value UTF-8
int j = 0;
for (size_t i = 0; i < len; i++)
{
if (in[i] < 0x80)
out[j++] = in[i];
else if ((in[i] >= 0xa0 && in[i] < 0xdb) || (in[i] > 0xde && in[i] < 0xfc))
{
int unicode = 0x0e00 + in[i] - 0xa0;
char o[5];
memset(o, 0, 5);
int r = encodeUnicode_UTF8(o, unicode);
for (int x = 0; x < r; x++)
out[j++] = o[x];
}
}
}
int ESP_Mail_Client::decodeLatin1_UTF8(unsigned char *out, int *outlen, const unsigned char *in, int *inlen)
{
unsigned char *outstart = out;
const unsigned char *base = in;
const unsigned char *processed = in;
unsigned char *outend = out + *outlen;
const unsigned char *inend;
unsigned int c;
int bits;
inend = in + (*inlen);
while ((in < inend) && (out - outstart + 5 < *outlen))
{
c = *in++;
/* assertion: c is a single UTF-4 value */
if (out >= outend)
break;
if (c < 0x80)
{
*out++ = c;
bits = -6;
}
else
{
*out++ = ((c >> 6) & 0x1F) | 0xC0;
bits = 0;
}
for (; bits >= 0; bits -= 6)
{
if (out >= outend)
break;
*out++ = ((c >> bits) & 0x3F) | 0x80;
}
processed = (const unsigned char *)in;
}
*outlen = out - outstart;
*inlen = processed - base;
return (0);
}
bool ESP_Mail_Client::sendFetchCommand(IMAPSession *imap, int msgIndex, esp_mail_imap_command cmdCase)
{
MB_String cmd, cmd2, cmd3;
appendHeadersFetchCommand(imap, cmd, msgIndex, false);
if (cmdCase == esp_mail_imap_cmd_fetch_body_mime)
{
joinStringDot(cmd2, 2, imap_commands[esp_mail_imap_command_header].text, imap_commands[esp_mail_imap_command_fields].text);
appendSpace(cmd2);
joinStringSpace(cmd3, false, 2, message_headers[esp_mail_message_header_field_content_type].text, message_headers[esp_mail_message_header_field_content_transfer_encoding].text);
appendString(cmd2, cmd3.c_str(), false, false, esp_mail_string_mark_type_round_bracket);
}
else if (cmdCase == esp_mail_imap_cmd_fetch_body_text)
cmd2 = cPart(imap)->partNumFetchStr.length() > 0 ? cPart(imap)->partNumFetchStr.c_str() : imap_commands[esp_mail_imap_command_text].text;
else if (cmdCase == esp_mail_imap_cmd_fetch_body_attachment)
cmd2 = cPart(imap)->partNumFetchStr;
if (cmd2.length() > 0)
appendString(cmd, cmd2.c_str(), false, false, esp_mail_string_mark_type_square_bracket);
bool allowPartialFetch = (cmdCase == esp_mail_imap_cmd_fetch_body_attachment && cPart(imap)->is_firmware_file) ? false : true;
if (imap->_mimeDataStreamCallback)
allowPartialFetch = false;
if (allowPartialFetch)
{
// Apply partial fetch in case download was disabled.
if (!imap->_storageReady && imap->_attDownload && cmdCase == esp_mail_imap_cmd_fetch_body_attachment)
cmd += esp_mail_str_48; /* "<0.0>" */ // This case should not happen because the memory storage was previousely checked.
else if ((!imap->_msgDownload && cmdCase == esp_mail_imap_cmd_fetch_body_text) || (imap->_msgDownload && !imap->_storageReady))
{
cmd += esp_mail_str_49; /* "<0." */
cmd += imap->_imap_data->limit.msg_size;
cmd += esp_mail_str_20; /* ">" */
}
}
if (imapSend(imap, cmd.c_str(), true) == ESP_MAIL_CLIENT_TRANSFER_DATA_FAILED)
return false;
return true;
}
bool ESP_Mail_Client::readMail(IMAPSession *imap, bool closeSession)
{
if (!imap || !sessionExisted<IMAPSession *>(imap))
return false;
imap->checkUID();
imap->checkPath();
imap->_cbData._success = false;
if (!imap->connected())
imap->_mailboxOpened = false;
imap->_isFirmwareUpdated = false;
MB_String buf, command, _uid;
size_t readCount = 0;
imap->_multipart_levels.clear();
if (!reconnect(imap))
return false;
imap->_msgDownload = imap->_imap_data->download.text || imap->_imap_data->download.html;
imap->_attDownload = imap->_imap_data->download.attachment || imap->_imap_data->download.inlineImg;
if (!imap->_storageChecked)
{
imap->_storageChecked = true;
imap->_storageReady = imap->_imap_data->download.header || (!imap->_imap_data->fetch.headerOnly && (imap->_msgDownload || imap->_attDownload)) ? mbfs->checkStorageReady(mbfs_type imap->_imap_data->storage.type) : true;
}
bool readyToDownload = (imap->_msgDownload || imap->_attDownload) && imap->_storageReady;
if (!imap->_storageReady)
sendStorageNotReadyError(imap, imap->_imap_data->storage.type);
#if defined(MB_ARDUINO_ESP) || defined(MB_ARDUINO_PICO)
int cmem = MailClient.getFreeHeap();
if (cmem < ESP_MAIL_MIN_MEM)
{
#if !defined(SILENT_MODE)
if (imap->_debug && imap->_statusCallback && !imap->_customCmdResCallback)
{
esp_mail_debug_print();
errorStatusCB<IMAPSession *, IMAPSession *>(imap, nullptr, MAIL_CLIENT_ERROR_OUT_OF_MEMORY, true);
}
#endif
goto out;
}
#endif
if (!imap->connected() && !imap->_loginStatus)
{
#if !defined(SILENT_MODE)
if (imap->_debug && imap->_statusCallback && !imap->_customCmdResCallback)
{
esp_mail_debug_print();
errorStatusCB<IMAPSession *, IMAPSession *>(imap, nullptr, MAIL_CLIENT_ERROR_NOT_YET_LOGIN, true);
}
#endif
return false;
}
// new session
if (!imap->connected())
{
// authenticate new
bool ssl = false;
if (!imap->connect(ssl))
{
closeTCPSession<IMAPSession *>(imap);
return false;
}
if (!imapAuth(imap, ssl))
{
closeTCPSession<IMAPSession *>(imap);
return false;
}
}
else
{
// If time config changed, we will update time
MailClient.prepareTime<IMAPSession *>(imap->_session_cfg, imap);
// reuse session
for (size_t i = 0; i < imap->_headers.size(); i++)
imap->_headers[i].part_headers.clear();
imap->_headers.clear();
if (imap->_imap_data->fetch.sequence_set.string.length() > 0 || imap->_imap_data->fetch.uid.length() > 0 || imap->_imap_data->fetch.number.length() > 0)
imap->_headerOnly = false;
else
imap->_headerOnly = true;
}
imap->_rfc822_part_count = 0;
imap->_mbif._availableItems = 0;
imap->_imap_msg_num.clear();
imap->_uidSearch = false;
imap->_mbif._searchCount = 0;
if (imap->_currentFolder.length() == 0)
return handleIMAPError(imap, IMAP_STATUS_NO_MAILBOX_FOLDER_OPENED, false);
if (!imap->_mailboxOpened || (imap->_imap_data->fetch.set_seen && !imap->_headerOnly && imap->_readOnlyMode))
{
if (!imap->openFolder(imap->_currentFolder.c_str(), imap->_readOnlyMode && !imap->_imap_data->fetch.set_seen))
return handleIMAPError(imap, IMAP_STATUS_OPEN_MAILBOX_FAILED, false);
}
if (imap->_headerOnly)
{
if (imap->_imap_data->search.criteria.length() > 0)
{
command = esp_mail_imap_tag_str;
#if !defined(SILENT_MODE)
printDebug<IMAPSession *>(imap,
esp_mail_cb_str_18 /* "Searching messages..." */,
esp_mail_dbg_str_36 /* "searching messages" */,
esp_mail_debug_tag_type_client,
true,
false);
#endif
if (strposP(imap->_imap_data->search.criteria.c_str(), imap_cmd_post_tokens[esp_mail_imap_command_uid].c_str(), 0) != -1)
{
imap->_uidSearch = true;
command += imap_cmd_pre_tokens[esp_mail_imap_command_uid];
}
command += imap_cmd_pre_tokens[esp_mail_imap_command_search];
imap->_imap_data->search.criteria.trim();
MB_String tag;
appendTagSpace(tag);
// Remove internal used reserved tag
if (strpos(imap->_imap_data->search.criteria.c_str(), tag.c_str(), 0, true) == 0)
imap->_imap_data->search.criteria.erase(0, tag.length());
for (size_t i = 0; i < imap->_imap_data->search.criteria.length(); i++)
{
if (imap->_imap_data->search.criteria[i] != ' ' && imap->_imap_data->search.criteria[i] != '\r' && imap->_imap_data->search.criteria[i] != '\n')
buf.append(1, imap->_imap_data->search.criteria[i]);
if (imap->_imap_data->search.criteria[i] == ' ')
{
if ((imap->_uidSearch && strcmp(buf.c_str(), imap_commands[esp_mail_imap_command_uid].text) == 0) || (imap->_unseen && buf.find(imap_commands[esp_mail_imap_command_all].text) != MB_String::npos))
buf.clear();
if (strcmp(buf.c_str(), imap_commands[esp_mail_imap_command_search].text) != 0 && buf.length() > 0)
prependSpace(command, buf.c_str());
buf.clear();
}
}
if (imap->_unseen && strpos(imap->_imap_data->search.criteria.c_str(), imap_cmd_pre_tokens[esp_mail_imap_command_new].c_str(), 0) == -1)
command += imap_cmd_pre_tokens[esp_mail_imap_command_new];
if (buf.length() > 0)
prependSpace(command, buf.c_str());
if (!imap->isModseqSupported() && strpos(imap->_imap_data->search.criteria.c_str(), imap_cmd_pre_tokens[esp_mail_imap_command_modsec].c_str(), 0, false) != -1)
{
imap->_responseStatus.errorCode = IMAP_STATUS_MODSEQ_WAS_NOT_SUPPORTED;
#if !defined(SILENT_MODE)
if (imap->_statusCallback)
sendErrorCB<IMAPSession *>(imap, imap->errorReason().c_str(), false, false);
if (imap->_debug)
esp_mail_debug_print_tag(imap->errorReason().c_str(), esp_mail_debug_tag_type_error, true);
#endif
return false;
}
if (imapSend(imap, command.c_str(), true) == ESP_MAIL_CLIENT_TRANSFER_DATA_FAILED)
return false;
command.clear();
imap->_imap_cmd = esp_mail_imap_cmd_search;
if (!handleIMAPResponse(imap, IMAP_STATUS_BAD_COMMAND, closeSession))
return false;
#if !defined(SILENT_MODE)
if (imap->_statusCallback)
{
callBackSendNewLine<IMAPSession *>(imap, false);
if (imap->_imap_msg_num.size() > 0)
{
int bufLen = 100;
char *buf = allocMem<char *>(bufLen);
snprintf(buf, bufLen, pgm2Str(esp_mail_str_50 /* "Search limit: %d\nFound %d messages\nShow %d messages\n" */), (int)imap->_imap_data->limit.search, imap->_mbif._searchCount, (int)imap->_imap_msg_num.size());
sendCallback<IMAPSession *>(imap, buf, false, false);
// release memory
freeMem(&buf);
}
else
sendCallback<IMAPSession *>(imap, esp_mail_error_imap_str_9 /* "no messages found for the specified search criteria" */, false, false);
}
#endif
}
else
{
#if !defined(SILENT_MODE)
if (imap->_statusCallback)
sendCallback<IMAPSession *>(imap, esp_mail_error_imap_str_10 /* "no search criteria provided, then fetching the latest message" */, false, false);
#endif
imap->_mbif._availableItems++;
esp_mail_imap_msg_num_t msg_num;
msg_num.type = esp_mail_imap_msg_num_type_number;
msg_num.value = (uint32_t)imap->_mbif._msgCount;
imap->_imap_msg_num.push_back(msg_num);
imap->_headerOnly = false;
imap->_imap_data->fetch.number = imap->_mbif._msgCount;
}
}
else
{
if (imap->_imap_data->fetch.sequence_set.string.length() > 0)
{
imap->_headerOnly = imap->_imap_data->fetch.sequence_set.headerOnly;
imap->mFetchSequenceSet();
imap->_mbif._availableItems = imap->_imap_msg_num.size();
}
else
{
if (imap->_imap_data->fetch.uid.length() > 0)
{
imap->_mbif._availableItems++;
esp_mail_imap_msg_num_t msg_num;
msg_num.type = esp_mail_imap_msg_num_type_uid;
msg_num.value = (uint32_t)atoi(imap->_imap_data->fetch.uid.c_str());
imap->_imap_msg_num.push_back(msg_num);
}
if (imap->_imap_data->fetch.number.length() > 0)
{
imap->_mbif._availableItems++;
esp_mail_imap_msg_num_t msg_num;
msg_num.type = esp_mail_imap_msg_num_type_number;
msg_num.value = (uint32_t)atoi(imap->_imap_data->fetch.number.c_str());
imap->_imap_msg_num.push_back(msg_num);
}
}
}
if (imap->_imap_data->fetch.headerOnly)
imap->_headerOnly = true;
for (size_t i = 0; i < imap->_imap_msg_num.size(); i++)
{
imap->_cMsgIdx = i;
imap->_totalRead++;
#if defined(MB_ARDUINO_ESP) || defined(MB_ARDUINO_PICO)
if (MailClient.getFreeHeap() - (imap->_imap_data->limit.msg_size * (i + 1)) < ESP_MAIL_MIN_MEM)
{
errorStatusCB<IMAPSession *, IMAPSession *>(imap, nullptr, MAIL_CLIENT_ERROR_OUT_OF_MEMORY, true);
goto out;
}
#endif
#if !defined(SILENT_MODE)
if (imap->_statusCallback)
{
readCount++;
int bufLen = 100;
PGM_P p = imap->_uidSearch || imap->_imap_msg_num[i].type == esp_mail_imap_msg_num_type_uid ? esp_mail_str_52 /* "Fetch message %d, UID: %d" */ : esp_mail_str_53 /* "Fetch message %d, Number: %d" */;
char *buf = allocMem<char *>(bufLen);
snprintf(buf, bufLen, pgm2Str(p), imap->_totalRead, (int)imap->_imap_msg_num[i].value);
sendCallback<IMAPSession *>(imap, buf, true, false);
// release memory
freeMem(&buf);
}
if (imap->_debug)
esp_mail_debug_print_tag(esp_mail_dbg_str_37 /* "send IMAP command, FETCH" */, esp_mail_debug_tag_type_client, true);
#endif
MB_String cmd;
appendHeadersFetchCommand(imap, cmd, i, true);
// We fetch only known RFC822 headers because
// using Fetch RFC822.HEADER reurns all included unused headers
// which required more memory and network bandwidth.
MB_String cmd2;
appendRFC822HeadersFetchCommand(cmd2);
appendString(cmd, cmd2.c_str(), false, false, esp_mail_string_mark_type_square_bracket);
imap->addModifier(cmd, esp_mail_imap_command_changedsince, imap->_imap_data->fetch.modsequence);
if (imapSend(imap, cmd.c_str(), true) == ESP_MAIL_CLIENT_TRANSFER_DATA_FAILED)
{
if (i < imap->_imap_msg_num.size() - 1)
continue;
return false;
}
imap->_imap_cmd = esp_mail_imap_cmd_fetch_body_header;
int err = imap->_headerOnly ? IMAP_STATUS_IMAP_RESPONSE_FAILED : IMAP_STATUS_BAD_COMMAND;
if (!handleIMAPResponse(imap, err, closeSession))
{
if (i < imap->_imap_msg_num.size() - 1)
continue;
return false;
}
if (!cHeader(imap))
continue;
if (imap->_imap_msg_num[i].type == esp_mail_imap_msg_num_type_number)
cHeader(imap)->message_uid = imap->mGetUID(cHeader(imap)->message_no);
cHeader(imap)->flags = imap->getFlags(cHeader(imap)->message_no);
if (!imap->_headerOnly)
{
imap->_cPartIdx = 0;
// Reset attachment state if it was set by "multipart/mixed" content type header
cHeader(imap)->hasAttachment = false;
#if !defined(SILENT_MODE)
if (imap->_debug)
debugPrintNewLine();
#endif
// multipart
if (cHeader(imap)->multipart)
{
struct esp_mail_imap_multipart_level_t mlevel;
mlevel.level = 1;
mlevel.fetch_rfc822_header = false;
mlevel.append_body_text = false;
imap->_multipart_levels.push_back(mlevel);
if (!fetchMultipartBodyHeader(imap, i))
return false;
}
else
{
// single part
if (imap->_debug)
printBodyPartFechingDubug(imap, "1", false);
cHeader(imap)->partNumStr.clear();
if (!sendFetchCommand(imap, i, esp_mail_imap_cmd_fetch_body_mime))
return false;
imap->_imap_cmd = esp_mail_imap_cmd_fetch_body_mime;
if (!handleIMAPResponse(imap, IMAP_STATUS_BAD_COMMAND, closeSession))
return false;
}
if (readyToDownload && imap->_imap_data->storage.saved_path.length() == 0)
imap->_imap_data->storage.saved_path = esp_mail_str_10; /* "/" */
if (cHeader(imap)->part_headers.size() > 0)
{
cHeader(imap)->sd_alias_file_count = 0;
imap->_sdFileList.clear();
if (!mbfs->longNameSupported())
imap->_sdFileList = esp_mail_str_40; /* "[" */
#if !defined(SILENT_MODE)
if (cHeader(imap)->attachment_count > 0 && imap->_statusCallback)
{
int bufLen = 100;
char *buf = allocMem<char *>(bufLen);
snprintf(buf, bufLen, pgm2Str(esp_mail_str_54 /* "Attachments (%d)" */), cHeader(imap)->attachment_count);
callBackSendNewLine<IMAPSession *>(imap, false);
sendCallback<IMAPSession *>(imap, buf, false, false);
// release memory
freeMem(&buf);
int count = 0;
for (size_t j = 0; j < cHeader(imap)->part_headers.size(); j++)
{
imap->_cPartIdx = j;
if (!cPart(imap)->rfc822_part && cPart(imap)->attach_type != esp_mail_att_type_none)
{
count++;
MB_String str = count;
appendDot(str);
prependSpace(str, cPart(imap)->filename.c_str());
sendCallback<IMAPSession *>(imap, str.c_str(), false, false);
}
}
}
#endif
MB_String s1, s2;
int _idx1 = 0;
for (size_t j = 0; j < cHeader(imap)->part_headers.size(); j++)
{
imap->_cPartIdx = j;
if (cPart(imap)->rfc822_part)
{
s1 = cPart(imap)->partNumStr;
_idx1 = cPart(imap)->rfc822_msg_Idx;
}
else if (s1.length() > 0)
{
if (multipartMember(s1, cPart(imap)->partNumStr))
{
cPart(imap)->message_sub_type = esp_mail_imap_message_sub_type_rfc822;
cPart(imap)->rfc822_msg_Idx = _idx1;
}
}
if (cPart(imap)->multipart_sub_type == esp_mail_imap_multipart_sub_type_parallel)
s2 = cPart(imap)->partNumStr;
else if (s2.length() > 0)
{
if (multipartMember(s2, cPart(imap)->partNumStr))
{
cPart(imap)->attach_type = esp_mail_att_type_attachment;
if (cPart(imap)->filename.length() == 0)
{
if (cPart(imap)->name.length() > 0)
cPart(imap)->filename = cPart(imap)->name;
else
{
char *uid = getRandomUID();
cPart(imap)->filename = uid;
cPart(imap)->filename += mimeinfo[esp_mail_file_extension_dat].endsWith;
freeMem(&uid);
}
}
}
}
checkFirmwareFile(imap, cPart(imap)->filename.c_str(), *cPart(imap), true);
}
int attach_count = 0;
int ccnt = 0;
for (size_t j = 0; j < cHeader(imap)->part_headers.size(); j++)
{
imap->_cPartIdx = j;
if (cPart(imap)->rfc822_part || cPart(imap)->multipart_sub_type != esp_mail_imap_multipart_sub_type_none)
continue;
bool rfc822_body_subtype = cPart(imap)->message_sub_type == esp_mail_imap_message_sub_type_rfc822 && cPart(imap)->attach_type != esp_mail_att_type_attachment;
if (cPart(imap)->attach_type == esp_mail_att_type_none && (cPart(imap)->msg_type == esp_mail_msg_type_html || cPart(imap)->msg_type == esp_mail_msg_type_plain || cPart(imap)->msg_type == esp_mail_msg_type_enriched))
{
bool ret = ((imap->_imap_data->enable.rfc822 || imap->_imap_data->download.rfc822) && rfc822_body_subtype) || (!rfc822_body_subtype && ((imap->_imap_data->enable.text && (cPart(imap)->msg_type == esp_mail_msg_type_plain || cPart(imap)->msg_type == esp_mail_msg_type_enriched)) || (imap->_imap_data->enable.html && cPart(imap)->msg_type == esp_mail_msg_type_html) || (cPart(imap)->msg_type == esp_mail_msg_type_html && imap->_imap_data->download.html) || ((cPart(imap)->msg_type == esp_mail_msg_type_plain || cPart(imap)->msg_type == esp_mail_msg_type_enriched) && imap->_imap_data->download.text)));
if (!ret)
continue;
#if !defined(SILENT_MODE)
if ((imap->_imap_data->download.rfc822 && rfc822_body_subtype) || (!rfc822_body_subtype && ((cPart(imap)->msg_type == esp_mail_msg_type_html && imap->_imap_data->download.html) || ((cPart(imap)->msg_type == esp_mail_msg_type_plain || cPart(imap)->msg_type == esp_mail_msg_type_enriched) && imap->_imap_data->download.text))))
{
if (ccnt == 0 && imap->_statusCallback)
sendCallback<IMAPSession *>(imap, esp_mail_cb_str_43 /* "Downloading messages..." */, true, false);
if (imap->_debug)
{
debugPrintNewLine();
if (cPart(imap)->msg_type == esp_mail_msg_type_plain || cPart(imap)->msg_type == esp_mail_msg_type_enriched)
esp_mail_debug_print_tag(esp_mail_dbg_str_74 /* "download plain TEXT message" */, esp_mail_debug_tag_type_client, true);
else if (cPart(imap)->msg_type == esp_mail_msg_type_html)
esp_mail_debug_print_tag(esp_mail_dbg_str_71 /* "download HTML message" */, esp_mail_debug_tag_type_client, true);
}
}
else
{
if (ccnt == 0)
sendCallback<IMAPSession *>(imap, esp_mail_cb_str_28 /* "Reading messages..." */, true, false);
if (imap->_debug)
{
debugPrintNewLine();
if (cPart(imap)->msg_type == esp_mail_msg_type_plain || cPart(imap)->msg_type == esp_mail_msg_type_enriched)
esp_mail_debug_print_tag(esp_mail_dbg_str_46 /* "reading plain TEXT message" */, esp_mail_debug_tag_type_client, true);
else if (cPart(imap)->msg_type == esp_mail_msg_type_html)
esp_mail_debug_print_tag(esp_mail_dbg_str_47 /* "reading HTML message" */, esp_mail_debug_tag_type_client, true);
}
}
#endif
ccnt++;
if (!sendFetchCommand(imap, i, esp_mail_imap_cmd_fetch_body_text))
return false;
imap->_imap_cmd = esp_mail_imap_cmd_fetch_body_text;
if (!handleIMAPResponse(imap, IMAP_STATUS_IMAP_RESPONSE_FAILED, closeSession))
return false;
}
else if (cPart(imap)->attach_type != esp_mail_att_type_none && (imap->_storageReady || cPart(imap)->is_firmware_file))
{
if (cPart(imap)->is_firmware_file || (imap->_imap_data->download.attachment && cPart(imap)->attach_type == esp_mail_att_type_attachment) || (imap->_imap_data->download.inlineImg && cPart(imap)->attach_type == esp_mail_att_type_inline))
{
#if !defined(SILENT_MODE)
if (cPart(imap)->save_to_file)
{
if (attach_count == 0 && imap->_statusCallback)
sendCallback<IMAPSession *>(imap, esp_mail_cb_str_19 /* "Downloading attachments..." */, true, false);
if (imap->_debug)
{
debugPrintNewLine();
int bufLen = 100;
char *buf = allocMem<char *>(bufLen);
snprintf(buf, bufLen, pgm2Str(esp_mail_dbg_str_70 /* "download attachment %d of %d" */), attach_count + 1, (int)cHeader(imap)->attachment_count);
esp_mail_debug_print_tag(buf, esp_mail_debug_tag_type_client, true);
// release memory
freeMem(&buf);
MB_String filePath = imap->_imap_data->storage.saved_path;
filePath += esp_mail_str_10; /* "/" */
filePath += cHeader(imap)->message_uid;
filePath += esp_mail_str_10; /* "/" */
filePath += cPart(imap)->filename;
esp_mail_debug_print_tag(filePath.c_str(), esp_mail_debug_tag_type_client, true);
}
}
#endif
attach_count++;
if (cPart(imap)->octetLen <= (int)imap->_imap_data->limit.attachment_size)
{
if (imap->_storageReady || cPart(imap)->is_firmware_file)
{
if ((int)j < (int)cHeader(imap)->part_headers.size() - 1)
if (cHeader(imap)->part_headers[j + 1].octetLen > (int)imap->_imap_data->limit.attachment_size)
cHeader(imap)->downloaded_bytes += cHeader(imap)->part_headers[j + 1].octetLen;
if (!sendFetchCommand(imap, i, esp_mail_imap_cmd_fetch_body_attachment))
return false;
imap->_imap_cmd = esp_mail_imap_cmd_fetch_body_attachment;
if (!handleIMAPResponse(imap, IMAP_STATUS_IMAP_RESPONSE_FAILED, closeSession))
return false;
yield_impl();
}
}
else
{
if ((int)j == (int)cHeader(imap)->part_headers.size() - 1)
cHeader(imap)->downloaded_bytes += cPart(imap)->octetLen;
}
}
}
}
}
if (imap->_storageReady && imap->_imap_data->download.header && !imap->_headerSaved)
{
#if !defined(SILENT_MODE)
if (imap->_statusCallback)
sendCallback<IMAPSession *>(imap, esp_mail_cb_str_21 /* "Saving message header to file..." */, true, false);
else if (imap->_debug)
debugPrintNewLine();
#endif
saveHeader(imap, false);
saveHeader(imap, true);
}
// save files list to file
if (imap->_storageReady && imap->_sdFileList.length() > 0)
{
MB_String filepath = cHeader(imap)->message_uid;
filepath += mimeinfo[esp_mail_file_extension_txt].endsWith;
if (mbfs->open(filepath, mbfs_type imap->_imap_data->storage.type, mb_fs_open_mode_write) > -1)
{
mbfs->print(mbfs_type imap->_imap_data->storage.type, imap->_sdFileList.c_str());
mbfs->close(mbfs_type imap->_imap_data->storage.type);
}
}
imap->_cMsgIdx++;
}
#if !defined(SILENT_MODE)
if (imap->_debug)
{
MB_String str = esp_mail_str_55; /* "Free Heap: " */
str += MailClient.getFreeHeap();
esp_mail_debug_print_tag(str.c_str(), esp_mail_debug_tag_type_client, true);
}
#endif
}
#if defined(MB_ARDUINO_ESP) || defined(MB_ARDUINO_PICO)
out:
#endif
if (readCount < imap->_imap_msg_num.size())
{
imap->_mbif._availableItems = readCount;
imap->_imap_msg_num.erase(imap->_imap_msg_num.begin() + readCount, imap->_imap_msg_num.end());
}