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  1: <?php
  2: 
  3: /**
  4:  * This file is part of the Nette Framework (https://nette.org)
  5:  * Copyright (c) 2004 David Grudl (https://davidgrudl.com)
  6:  */
  7: 
  8: namespace Nette\Mail;
  9: 
 10: use Nette;
 11: use Nette\Utils\Strings;
 12: 
 13: 
 14: /**
 15:  * MIME message part.
 16:  *
 17:  * @property   string $body
 18:  */
 19: class MimePart
 20: {
 21:     use Nette\SmartObject;
 22: 
 23:     /** encoding */
 24:     const ENCODING_BASE64 = 'base64',
 25:         ENCODING_7BIT = '7bit',
 26:         ENCODING_8BIT = '8bit',
 27:         ENCODING_QUOTED_PRINTABLE = 'quoted-printable';
 28: 
 29:     /** @internal */
 30:     const EOL = "\r\n";
 31:     const LINE_LENGTH = 76;
 32: 
 33:     /** @var array */
 34:     private $headers = [];
 35: 
 36:     /** @var array */
 37:     private $parts = [];
 38: 
 39:     /** @var string */
 40:     private $body = '';
 41: 
 42: 
 43:     /**
 44:      * Sets a header.
 45:      * @param  string
 46:      * @param  string|array  value or pair email => name
 47:      * @param  bool
 48:      * @return static
 49:      */
 50:     public function setHeader($name, $value, $append = false)
 51:     {
 52:         if (!$name || preg_match('#[^a-z0-9-]#i', $name)) {
 53:             throw new Nette\InvalidArgumentException("Header name must be non-empty alphanumeric string, '$name' given.");
 54:         }
 55: 
 56:         if ($value == null) { // intentionally ==
 57:             if (!$append) {
 58:                 unset($this->headers[$name]);
 59:             }
 60: 
 61:         } elseif (is_array($value)) { // email
 62:             $tmp = &$this->headers[$name];
 63:             if (!$append || !is_array($tmp)) {
 64:                 $tmp = [];
 65:             }
 66: 
 67:             foreach ($value as $email => $recipient) {
 68:                 if ($recipient === null) {
 69:                     // continue
 70:                 } elseif (!Strings::checkEncoding($recipient)) {
 71:                     Nette\Utils\Validators::assert($recipient, 'unicode', "header '$name'");
 72:                 } elseif (preg_match('#[\r\n]#', $recipient)) {
 73:                     throw new Nette\InvalidArgumentException('Name must not contain line separator.');
 74:                 }
 75:                 Nette\Utils\Validators::assert($email, 'email', "header '$name'");
 76:                 $tmp[$email] = $recipient;
 77:             }
 78: 
 79:         } else {
 80:             $value = (string) $value;
 81:             if (!Strings::checkEncoding($value)) {
 82:                 throw new Nette\InvalidArgumentException('Header is not valid UTF-8 string.');
 83:             }
 84:             $this->headers[$name] = preg_replace('#[\r\n]+#', ' ', $value);
 85:         }
 86:         return $this;
 87:     }
 88: 
 89: 
 90:     /**
 91:      * Returns a header.
 92:      * @param  string
 93:      * @return mixed
 94:      */
 95:     public function getHeader($name)
 96:     {
 97:         return isset($this->headers[$name]) ? $this->headers[$name] : null;
 98:     }
 99: 
100: 
101:     /**
102:      * Removes a header.
103:      * @param  string
104:      * @return static
105:      */
106:     public function clearHeader($name)
107:     {
108:         unset($this->headers[$name]);
109:         return $this;
110:     }
111: 
112: 
113:     /**
114:      * Returns an encoded header.
115:      * @param  string
116:      * @return string|null
117:      */
118:     public function getEncodedHeader($name)
119:     {
120:         $offset = strlen($name) + 2; // colon + space
121: 
122:         if (!isset($this->headers[$name])) {
123:             return null;
124: 
125:         } elseif (is_array($this->headers[$name])) {
126:             $s = '';
127:             foreach ($this->headers[$name] as $email => $name) {
128:                 if ($name != null) { // intentionally ==
129:                     $s .= self::encodeHeader($name, $offset, true);
130:                     $email = " <$email>";
131:                 }
132:                 $s .= self::append($email . ',', $offset);
133:             }
134:             return ltrim(substr($s, 0, -1)); // last comma
135: 
136:         } elseif (preg_match('#^(\S+; (?:file)?name=)"(.*)"\z#', $this->headers[$name], $m)) { // Content-Disposition
137:             $offset += strlen($m[1]);
138:             return $m[1] . '"' . self::encodeHeader($m[2], $offset) . '"';
139: 
140:         } else {
141:             return ltrim(self::encodeHeader($this->headers[$name], $offset));
142:         }
143:     }
144: 
145: 
146:     /**
147:      * Returns all headers.
148:      * @return array
149:      */
150:     public function getHeaders()
151:     {
152:         return $this->headers;
153:     }
154: 
155: 
156:     /**
157:      * Sets Content-Type header.
158:      * @param  string
159:      * @param  string
160:      * @return static
161:      */
162:     public function setContentType($contentType, $charset = null)
163:     {
164:         $this->setHeader('Content-Type', $contentType . ($charset ? "; charset=$charset" : ''));
165:         return $this;
166:     }
167: 
168: 
169:     /**
170:      * Sets Content-Transfer-Encoding header.
171:      * @param  string
172:      * @return static
173:      */
174:     public function setEncoding($encoding)
175:     {
176:         $this->setHeader('Content-Transfer-Encoding', $encoding);
177:         return $this;
178:     }
179: 
180: 
181:     /**
182:      * Returns Content-Transfer-Encoding header.
183:      * @return string
184:      */
185:     public function getEncoding()
186:     {
187:         return $this->getHeader('Content-Transfer-Encoding');
188:     }
189: 
190: 
191:     /**
192:      * Adds or creates new multipart.
193:      * @return self
194:      */
195:     public function addPart(MimePart $part = null)
196:     {
197:         return $this->parts[] = $part === null ? new self : $part;
198:     }
199: 
200: 
201:     /**
202:      * Sets textual body.
203:      * @param  string
204:      * @return static
205:      */
206:     public function setBody($body)
207:     {
208:         $this->body = (string) $body;
209:         return $this;
210:     }
211: 
212: 
213:     /**
214:      * Gets textual body.
215:      * @return string
216:      */
217:     public function getBody()
218:     {
219:         return $this->body;
220:     }
221: 
222: 
223:     /********************* building ****************d*g**/
224: 
225: 
226:     /**
227:      * Returns encoded message.
228:      * @return string
229:      */
230:     public function getEncodedMessage()
231:     {
232:         $output = '';
233:         $boundary = '--------' . Nette\Utils\Random::generate();
234: 
235:         foreach ($this->headers as $name => $value) {
236:             $output .= $name . ': ' . $this->getEncodedHeader($name);
237:             if ($this->parts && $name === 'Content-Type') {
238:                 $output .= ';' . self::EOL . "\tboundary=\"$boundary\"";
239:             }
240:             $output .= self::EOL;
241:         }
242:         $output .= self::EOL;
243: 
244:         $body = $this->body;
245:         if ($body !== '') {
246:             switch ($this->getEncoding()) {
247:                 case self::ENCODING_QUOTED_PRINTABLE:
248:                     $output .= quoted_printable_encode($body);
249:                     break;
250: 
251:                 case self::ENCODING_BASE64:
252:                     $output .= rtrim(chunk_split(base64_encode($body), self::LINE_LENGTH, self::EOL));
253:                     break;
254: 
255:                 case self::ENCODING_7BIT:
256:                     $body = preg_replace('#[\x80-\xFF]+#', '', $body);
257:                     // break omitted
258: 
259:                 case self::ENCODING_8BIT:
260:                     $body = str_replace(["\x00", "\r"], '', $body);
261:                     $body = str_replace("\n", self::EOL, $body);
262:                     $output .= $body;
263:                     break;
264: 
265:                 default:
266:                     throw new Nette\InvalidStateException('Unknown encoding.');
267:             }
268:         }
269: 
270:         if ($this->parts) {
271:             if (substr($output, -strlen(self::EOL)) !== self::EOL) {
272:                 $output .= self::EOL;
273:             }
274:             foreach ($this->parts as $part) {
275:                 $output .= '--' . $boundary . self::EOL . $part->getEncodedMessage() . self::EOL;
276:             }
277:             $output .= '--' . $boundary . '--';
278:         }
279: 
280:         return $output;
281:     }
282: 
283: 
284:     /********************* QuotedPrintable helpers ****************d*g**/
285: 
286: 
287:     /**
288:      * Converts a 8 bit header to a string.
289:      * @param  string
290:      * @param  int
291:      * @param  bool
292:      * @return string
293:      */
294:     private static function encodeHeader($s, &$offset = 0, $quotes = false)
295:     {
296:         if (strspn($s, "!\"#$%&\'()*+,-./0123456789:;<>@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^`abcdefghijklmnopqrstuvwxyz{|}~=? _\r\n\t") === strlen($s)) {
297:             if ($quotes && preg_match('#[^ a-zA-Z0-9!\#$%&\'*+/?^_`{|}~-]#', $s)) { // RFC 2822 atext except =
298:                 return self::append('"' . addcslashes($s, '"\\') . '"', $offset);
299:             }
300:             return self::append($s, $offset);
301:         }
302: 
303:         $o = '';
304:         if ($offset >= 55) { // maximum for iconv_mime_encode
305:             $o = self::EOL . "\t";
306:             $offset = 1;
307:         }
308: 
309:         $s = iconv_mime_encode(str_repeat(' ', $old = $offset), $s, [
310:             'scheme' => 'B', // Q is broken
311:             'input-charset' => 'UTF-8',
312:             'output-charset' => 'UTF-8',
313:         ]);
314: 
315:         $offset = strlen($s) - strrpos($s, "\n");
316:         $s = str_replace("\n ", "\n\t", substr($s, $old + 2)); // adds ': '
317:         return $o . $s;
318:     }
319: 
320: 
321:     private static function append($s, &$offset = 0)
322:     {
323:         if ($offset + strlen($s) > self::LINE_LENGTH) {
324:             $offset = 1;
325:             $s = self::EOL . "\t" . $s;
326:         }
327:         $offset += strlen($s);
328:         return $s;
329:     }
330: }
331: 
Nette 2.4-20170829 API API documentation generated by ApiGen 2.8.0