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213 lines
8.9 KiB
213 lines
8.9 KiB
<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\Mime\Tests\Encoder;
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use PHPUnit\Framework\TestCase;
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use Symfony\Component\Mime\Encoder\QpEncoder;
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class QpEncoderTest extends TestCase
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{
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/* -- RFC 2045, 6.7 --
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(1) (General 8bit representation) Any octet, except a CR or
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LF that is part of a CRLF line break of the canonical
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(standard) form of the data being encoded, may be
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represented by an "=" followed by a two digit
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hexadecimal representation of the octet's value. The
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digits of the hexadecimal alphabet, for this purpose,
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are "0123456789ABCDEF". Uppercase letters must be
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used; lowercase letters are not allowed. Thus, for
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example, the decimal value 12 (US-ASCII form feed) can
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be represented by "=0C", and the decimal value 61 (US-
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ASCII EQUAL SIGN) can be represented by "=3D". This
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rule must be followed except when the following rules
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allow an alternative encoding.
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*/
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public function testPermittedCharactersAreNotEncoded()
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{
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/* -- RFC 2045, 6.7 --
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(2) (Literal representation) Octets with decimal values of
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33 through 60 inclusive, and 62 through 126, inclusive,
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MAY be represented as the US-ASCII characters which
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correspond to those octets (EXCLAMATION POINT through
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LESS THAN, and GREATER THAN through TILDE,
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respectively).
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*/
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$encoder = new QpEncoder();
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foreach (array_merge(range(33, 60), range(62, 126)) as $ordinal) {
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$char = \chr($ordinal);
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$this->assertSame($char, $encoder->encodeString($char));
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}
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}
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public function testWhiteSpaceAtLineEndingIsEncoded()
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{
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/* -- RFC 2045, 6.7 --
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(3) (White Space) Octets with values of 9 and 32 MAY be
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represented as US-ASCII TAB (HT) and SPACE characters,
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respectively, but MUST NOT be so represented at the end
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of an encoded line. Any TAB (HT) or SPACE characters
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on an encoded line MUST thus be followed on that line
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by a printable character. In particular, an "=" at the
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end of an encoded line, indicating a soft line break
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(see rule #5) may follow one or more TAB (HT) or SPACE
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characters. It follows that an octet with decimal
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value 9 or 32 appearing at the end of an encoded line
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must be represented according to Rule #1. This rule is
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necessary because some MTAs (Message Transport Agents,
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programs which transport messages from one user to
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another, or perform a portion of such transfers) are
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known to pad lines of text with SPACEs, and others are
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known to remove "white space" characters from the end
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of a line. Therefore, when decoding a Quoted-Printable
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body, any trailing white space on a line must be
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deleted, as it will necessarily have been added by
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intermediate transport agents.
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*/
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$encoder = new QpEncoder();
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$HT = \chr(0x09); // 9
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$SPACE = \chr(0x20); // 32
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// HT
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$string = 'a'.$HT.$HT."\r\n".'b';
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$this->assertEquals('a'.$HT.'=09'."\r\n".'b', $encoder->encodeString($string));
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// SPACE
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$string = 'a'.$SPACE.$SPACE."\r\n".'b';
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$this->assertEquals('a'.$SPACE.'=20'."\r\n".'b', $encoder->encodeString($string));
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}
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public function testCRLFIsLeftAlone()
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{
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/*
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(4) (Line Breaks) A line break in a text body, represented
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as a CRLF sequence in the text canonical form, must be
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represented by a (RFC 822) line break, which is also a
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CRLF sequence, in the Quoted-Printable encoding. Since
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the canonical representation of media types other than
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text do not generally include the representation of
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line breaks as CRLF sequences, no hard line breaks
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(i.e. line breaks that are intended to be meaningful
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and to be displayed to the user) can occur in the
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quoted-printable encoding of such types. Sequences
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like "=0D", "=0A", "=0A=0D" and "=0D=0A" will routinely
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appear in non-text data represented in quoted-
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printable, of course.
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Note that many implementations may elect to encode the
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local representation of various content types directly
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rather than converting to canonical form first,
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encoding, and then converting back to local
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representation. In particular, this may apply to plain
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text material on systems that use newline conventions
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other than a CRLF terminator sequence. Such an
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implementation optimization is permissible, but only
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when the combined canonicalization-encoding step is
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equivalent to performing the three steps separately.
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*/
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$encoder = new QpEncoder();
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$string = 'a'."\r\n".'b'."\r\n".'c'."\r\n";
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$this->assertEquals($string, $encoder->encodeString($string));
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}
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public function testLinesLongerThan76CharactersAreSoftBroken()
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{
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/*
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(5) (Soft Line Breaks) The Quoted-Printable encoding
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REQUIRES that encoded lines be no more than 76
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characters long. If longer lines are to be encoded
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with the Quoted-Printable encoding, "soft" line breaks
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must be used. An equal sign as the last character on a
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encoded line indicates such a non-significant ("soft")
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line break in the encoded text.
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*/
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$encoder = new QpEncoder();
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$input = str_repeat('a', 140);
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$output = '';
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for ($i = 0; $i < 140; ++$i) {
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// we read 4 chars at a time (max is 75)
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if (18 * 4 /* 72 */ == $i) {
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$output .= "=\r\n";
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}
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$output .= 'a';
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}
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$this->assertEquals($output, $encoder->encodeString($input));
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}
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public function testMaxLineLengthCanBeSpecified()
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{
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$encoder = new QpEncoder();
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$input = str_repeat('a', 100);
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$output = '';
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for ($i = 0; $i < 100; ++$i) {
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// we read 4 chars at a time (max is 53)
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if (13 * 4 /* 52 */ == $i) {
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$output .= "=\r\n";
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}
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$output .= 'a';
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}
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$this->assertEquals($output, $encoder->encodeString($input, 'utf-8', 0, 54));
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}
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public function testBytesBelowPermittedRangeAreEncoded()
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{
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// According to Rule (1 & 2)
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$encoder = new QpEncoder();
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foreach (range(0, 32) as $ordinal) {
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$char = \chr($ordinal);
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$this->assertEquals(sprintf('=%02X', $ordinal), $encoder->encodeString($char));
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}
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}
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public function testDecimalByte61IsEncoded()
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{
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// According to Rule (1 & 2)
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$encoder = new QpEncoder();
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$this->assertEquals('=3D', $encoder->encodeString('='));
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}
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public function testBytesAbovePermittedRangeAreEncoded()
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{
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// According to Rule (1 & 2)
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$encoder = new QpEncoder();
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foreach (range(127, 255) as $ordinal) {
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$this->assertSame(sprintf('=%02X', $ordinal), $encoder->encodeString(\chr($ordinal), 'iso-8859-1'));
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}
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}
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public function testFirstLineLengthCanBeDifferent()
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{
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$encoder = new QpEncoder();
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$input = str_repeat('a', 140);
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$output = '';
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for ($i = 0; $i < 140; ++$i) {
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// we read 4 chars at a time (max is 54 for the first line and 75 for the second one)
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if (13 * 4 == $i || 13 * 4 + 18 * 4 == $i) {
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$output .= "=\r\n";
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}
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$output .= 'a';
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}
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$this->assertEquals($output, $encoder->encodeString($input, 'utf-8', 22), 'First line should start at offset 22 so can only have max length 54');
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}
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public function testTextIsPreWrapped()
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{
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$encoder = new QpEncoder();
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$input = str_repeat('a', 70)."\r\n".str_repeat('a', 70)."\r\n".str_repeat('a', 70);
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$this->assertEquals($input, $encoder->encodeString($input));
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}
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}
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