25
26 /*-
27 * news stream opener
28 */
29
30 package sun.net.www;
31
32 import java.io.*;
33 import java.util.Collections;
34 import java.util.*;
35
36 /** An RFC 844 or MIME message header. Includes methods
37 for parsing headers from incoming streams, fetching
38 values, setting values, and printing headers.
39 Key values of null are legal: they indicate lines in
40 the header that don't have a valid key, but do have
41 a value (this isn't legal according to the standard,
42 but lines like this are everywhere). */
43 public
44 class MessageHeader {
45 private String keys[];
46 private String values[];
47 private int nkeys;
48
49 public MessageHeader () {
50 grow();
51 }
52
53 public MessageHeader (InputStream is) throws java.io.IOException {
54 parseHeader(is);
55 }
56
57 /**
58 * Returns list of header names in a comma separated list
59 */
60 public synchronized String getHeaderNamesInList() {
61 StringJoiner joiner = new StringJoiner(",");
62 for (int i=0; i<nkeys; i++) {
63 joiner.add(keys[i]);
64 }
65 return joiner.toString();
66 }
428 c <= ' ')) {
429 len--;
430 substr = true;
431 }
432 return substr ? id.substring(st, len) : id;
433 }
434
435 /** Parse a MIME header from an input stream. */
436 public void parseHeader(InputStream is) throws java.io.IOException {
437 synchronized (this) {
438 nkeys = 0;
439 }
440 mergeHeader(is);
441 }
442
443 /** Parse and merge a MIME header from an input stream. */
444 @SuppressWarnings("fallthrough")
445 public void mergeHeader(InputStream is) throws java.io.IOException {
446 if (is == null)
447 return;
448 char s[] = new char[10];
449 int firstc = is.read();
450 while (firstc != '\n' && firstc != '\r' && firstc >= 0) {
451 int len = 0;
452 int keyend = -1;
453 int c;
454 boolean inKey = firstc > ' ';
455 s[len++] = (char) firstc;
456 parseloop:{
457 while ((c = is.read()) >= 0) {
458 switch (c) {
459 case ':':
460 if (inKey && len > 0)
461 keyend = len;
462 inKey = false;
463 break;
464 case '\t':
465 c = ' ';
466 /*fall through*/
467 case ' ':
468 inKey = false;
469 break;
470 case '\r':
471 case '\n':
472 firstc = is.read();
473 if (c == '\r' && firstc == '\n') {
474 firstc = is.read();
475 if (firstc == '\r')
476 firstc = is.read();
477 }
478 if (firstc == '\n' || firstc == '\r' || firstc > ' ')
479 break parseloop;
480 /* continuation */
481 c = ' ';
482 break;
483 }
484 if (len >= s.length) {
485 char ns[] = new char[s.length * 2];
486 System.arraycopy(s, 0, ns, 0, len);
487 s = ns;
488 }
489 s[len++] = (char) c;
490 }
491 firstc = -1;
492 }
493 while (len > 0 && s[len - 1] <= ' ')
494 len--;
495 String k;
496 if (keyend <= 0) {
497 k = null;
498 keyend = 0;
499 } else {
500 k = String.copyValueOf(s, 0, keyend);
501 if (keyend < len && s[keyend] == ':')
502 keyend++;
503 while (keyend < len && s[keyend] <= ' ')
504 keyend++;
505 }
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25
26 /*-
27 * news stream opener
28 */
29
30 package sun.net.www;
31
32 import java.io.*;
33 import java.util.Collections;
34 import java.util.*;
35
36 /** An RFC 844 or MIME message header. Includes methods
37 for parsing headers from incoming streams, fetching
38 values, setting values, and printing headers.
39 Key values of null are legal: they indicate lines in
40 the header that don't have a valid key, but do have
41 a value (this isn't legal according to the standard,
42 but lines like this are everywhere). */
43 public
44 class MessageHeader {
45 private String[] keys;
46 private String[] values;
47 private int nkeys;
48
49 public MessageHeader () {
50 grow();
51 }
52
53 public MessageHeader (InputStream is) throws java.io.IOException {
54 parseHeader(is);
55 }
56
57 /**
58 * Returns list of header names in a comma separated list
59 */
60 public synchronized String getHeaderNamesInList() {
61 StringJoiner joiner = new StringJoiner(",");
62 for (int i=0; i<nkeys; i++) {
63 joiner.add(keys[i]);
64 }
65 return joiner.toString();
66 }
428 c <= ' ')) {
429 len--;
430 substr = true;
431 }
432 return substr ? id.substring(st, len) : id;
433 }
434
435 /** Parse a MIME header from an input stream. */
436 public void parseHeader(InputStream is) throws java.io.IOException {
437 synchronized (this) {
438 nkeys = 0;
439 }
440 mergeHeader(is);
441 }
442
443 /** Parse and merge a MIME header from an input stream. */
444 @SuppressWarnings("fallthrough")
445 public void mergeHeader(InputStream is) throws java.io.IOException {
446 if (is == null)
447 return;
448 char[] s = new char[10];
449 int firstc = is.read();
450 while (firstc != '\n' && firstc != '\r' && firstc >= 0) {
451 int len = 0;
452 int keyend = -1;
453 int c;
454 boolean inKey = firstc > ' ';
455 s[len++] = (char) firstc;
456 parseloop:{
457 while ((c = is.read()) >= 0) {
458 switch (c) {
459 case ':':
460 if (inKey && len > 0)
461 keyend = len;
462 inKey = false;
463 break;
464 case '\t':
465 c = ' ';
466 /*fall through*/
467 case ' ':
468 inKey = false;
469 break;
470 case '\r':
471 case '\n':
472 firstc = is.read();
473 if (c == '\r' && firstc == '\n') {
474 firstc = is.read();
475 if (firstc == '\r')
476 firstc = is.read();
477 }
478 if (firstc == '\n' || firstc == '\r' || firstc > ' ')
479 break parseloop;
480 /* continuation */
481 c = ' ';
482 break;
483 }
484 if (len >= s.length) {
485 char[] ns = new char[s.length * 2];
486 System.arraycopy(s, 0, ns, 0, len);
487 s = ns;
488 }
489 s[len++] = (char) c;
490 }
491 firstc = -1;
492 }
493 while (len > 0 && s[len - 1] <= ' ')
494 len--;
495 String k;
496 if (keyend <= 0) {
497 k = null;
498 keyend = 0;
499 } else {
500 k = String.copyValueOf(s, 0, keyend);
501 if (keyend < len && s[keyend] == ':')
502 keyend++;
503 while (keyend < len && s[keyend] <= ' ')
504 keyend++;
505 }
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