Mercurial > hg
annotate tests/test-commit-multiple.t @ 37048:fc5e261915b9
wireproto: require POST for all HTTPv2 requests
Wire protocol version 1 transfers argument data via request
headers by default. This has historically caused problems because
servers institute limits on the length of individual HTTP headers
as well as the total size of all request headers. Mercurial servers
can advertise the maximum length of an individual header. But
there's no guarantee any intermediate HTTP agents will accept
headers up to that length.
In the existing wire protocol, server operators typically also
key off the HTTP request method to implement authentication.
For example, GET requests translate to read-only requests and
can be allowed. But read-write commands must use POST and require
authentication. This has typically worked because the only wire
protocol commands that use POST modify the repo (e.g. the
"unbundle" command).
There is an experimental feature to enable clients to transmit
argument data via POST request bodies. This is technically a
better and more robust solution. But we can't enable it by default
because of servers assuming POST means write access.
In version 2 of the wire protocol, the permissions of a request
are encoded in the URL. And with it being a new protocol in a new
URL space, we're not constrained by backwards compatibility
requirements.
This commit adopts the technically superior mechanism of using
HTTP request bodies to send argument data by requiring POST for
all commands. Strictly speaking, it may be possible to send
request bodies on GET requests. But my experience is that not all
HTTP stacks support this. POST pretty much always works. Using POST
for read-only operations does sacrifice some RESTful design
purity. But this API cares about practicality, not about being
in Roy T. Fielding's REST ivory tower.
There's a chance we may relax this restriction in the future. But
for now, I want to see how far we can get with a POST only API.
Differential Revision: https://phab.mercurial-scm.org/D2837
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Tue, 13 Mar 2018 11:57:43 -0700 |
parents | e2c0c0884b1f |
children | 5abc47d4ca6b |
rev | line source |
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1 # reproduce issue2264, issue2516 |
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2 |
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3 create test repo |
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4 $ cat <<EOF >> $HGRCPATH |
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5 > [extensions] |
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6 > transplant = |
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7 > EOF |
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8 $ hg init repo |
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9 $ cd repo |
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10 $ template="{rev} {desc|firstline} [{branch}]\n" |
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11 |
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12 # we need to start out with two changesets on the default branch |
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13 # in order to avoid the cute little optimization where transplant |
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14 # pulls rather than transplants |
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15 add initial changesets |
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16 $ echo feature1 > file1 |
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17 $ hg ci -Am"feature 1" |
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18 adding file1 |
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19 $ echo feature2 >> file2 |
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20 $ hg ci -Am"feature 2" |
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21 adding file2 |
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22 |
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23 # The changes to 'bugfix' are enough to show the bug: in fact, with only |
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24 # those changes, it's a very noisy crash ("RuntimeError: nothing |
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25 # committed after transplant"). But if we modify a second file in the |
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26 # transplanted changesets, the bug is much more subtle: transplant |
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27 # silently drops the second change to 'bugfix' on the floor, and we only |
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28 # see it when we run 'hg status' after transplanting. Subtle data loss |
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29 # bugs are worse than crashes, so reproduce the subtle case here. |
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30 commit bug fixes on bug fix branch |
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31 $ hg branch fixes |
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32 marked working directory as branch fixes |
15615 | 33 (branches are permanent and global, did you want a bookmark?) |
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34 $ echo fix1 > bugfix |
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35 $ echo fix1 >> file1 |
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36 $ hg ci -Am"fix 1" |
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37 adding bugfix |
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38 $ echo fix2 > bugfix |
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39 $ echo fix2 >> file1 |
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40 $ hg ci -Am"fix 2" |
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41 $ hg log -G --template="$template" |
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42 @ 3 fix 2 [fixes] |
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43 | |
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44 o 2 fix 1 [fixes] |
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45 | |
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46 o 1 feature 2 [default] |
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47 | |
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48 o 0 feature 1 [default] |
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49 |
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50 transplant bug fixes onto release branch |
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51 $ hg update 0 |
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52 1 files updated, 0 files merged, 2 files removed, 0 files unresolved |
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53 $ hg branch release |
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54 marked working directory as branch release |
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55 $ hg transplant 2 3 |
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56 applying [0-9a-f]{12} (re) |
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57 [0-9a-f]{12} transplanted to [0-9a-f]{12} (re) |
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58 applying [0-9a-f]{12} (re) |
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59 [0-9a-f]{12} transplanted to [0-9a-f]{12} (re) |
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60 $ hg log -G --template="$template" |
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61 @ 5 fix 2 [release] |
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62 | |
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63 o 4 fix 1 [release] |
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64 | |
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65 | o 3 fix 2 [fixes] |
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66 | | |
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67 | o 2 fix 1 [fixes] |
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68 | | |
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69 | o 1 feature 2 [default] |
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70 |/ |
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71 o 0 feature 1 [default] |
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72 |
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73 $ hg status |
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74 $ hg status --rev 0:4 |
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75 M file1 |
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76 A bugfix |
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77 $ hg status --rev 4:5 |
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78 M bugfix |
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79 M file1 |
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80 |
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81 now test that we fixed the bug for all scripts/extensions |
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82 $ cat > $TESTTMP/committwice.py <<__EOF__ |
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83 > from mercurial import ui, hg, match, node |
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84 > from time import sleep |
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85 > |
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86 > def replacebyte(fn, b): |
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87 > f = open(fn, "rb+") |
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88 > f.seek(0, 0) |
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89 > f.write(b) |
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90 > f.close() |
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91 > |
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92 > def printfiles(repo, rev): |
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93 > repo.ui.status(b"revision %d files: [%s]\n" |
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94 > % (rev, b', '.join(b"'%s'" % f |
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95 > for f in repo[rev].files()))) |
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96 > |
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97 > repo = hg.repository(ui.ui.load(), b'.') |
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98 > assert len(repo) == 6, \ |
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99 > "initial: len(repo): %d, expected: 6" % len(repo) |
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100 > |
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101 > replacebyte(b"bugfix", b"u") |
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102 > sleep(2) |
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103 > try: |
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104 > repo.ui.status(b"PRE: len(repo): %d\n" % len(repo)) |
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105 > wlock = repo.wlock() |
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106 > lock = repo.lock() |
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107 > replacebyte(b"file1", b"x") |
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108 > repo.commit(text=b"x", user=b"test", date=(0, 0)) |
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109 > replacebyte(b"file1", b"y") |
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110 > repo.commit(text=b"y", user=b"test", date=(0, 0)) |
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111 > repo.ui.status(b"POST: len(repo): %d\n" % len(repo)) |
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112 > finally: |
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113 > lock.release() |
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114 > wlock.release() |
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115 > printfiles(repo, 6) |
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116 > printfiles(repo, 7) |
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117 > __EOF__ |
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118 $ $PYTHON $TESTTMP/committwice.py |
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119 PRE: len(repo): 6 |
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120 POST: len(repo): 8 |
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121 revision 6 files: ['bugfix', 'file1'] |
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122 revision 7 files: ['file1'] |
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123 |
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124 Do a size-preserving modification outside of that process |
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125 $ echo abcd > bugfix |
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126 $ hg status |
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127 M bugfix |
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128 $ hg log --template "{rev} {desc} {files}\n" -r5: |
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129 5 fix 2 bugfix file1 |
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130 6 x bugfix file1 |
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131 7 y file1 |
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132 |
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133 $ cd .. |