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| 4 | SYNOPSIS |
4 | SYNOPSIS |
| 5 | use Net::FCP; |
5 | use Net::FCP; |
| 6 | |
6 | |
| 7 | my $fcp = new Net::FCP; |
7 | my $fcp = new Net::FCP; |
| 8 | |
8 | |
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9 | my $ni = $fcp->txn_node_info->result; |
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10 | my $ni = $fcp->node_info; |
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11 | |
| 9 | DESCRIPTION |
12 | DESCRIPTION |
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13 | See <http://freenet.sourceforge.net/index.php?page=fcp> for a |
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14 | description of what the messages do. I am too lazy to document all this |
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15 | here. |
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16 | |
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17 | WARNING |
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18 | This module is alpha. While it probably won't destroy (much :) of your |
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19 | data, it currently falls short of what it should provide (intelligent |
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20 | uri following, splitfile downloads, healing...) |
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21 | |
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22 | IMPORT TAGS |
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23 | Nothing much can be "imported" from this module right now. There are, |
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24 | however, certain "import tags" that can be used to select the event |
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25 | model to be used. |
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26 | |
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27 | Event models are implemented as modules under the "Net::FCP::Event::xyz" |
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28 | class, where "xyz" is the event model to use. The default is "Event" (or |
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29 | later "Auto"). |
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30 | |
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31 | The import tag to use is named "event=xyz", e.g. "event=Event", |
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32 | "event=Glib" etc. |
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33 | |
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34 | You should specify the event module to use only in the main program. |
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35 | |
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36 | FREENET BASICS |
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37 | Ok, this section will not explain any freenet basics to you, just some |
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38 | problems I found that you might want to avoid: |
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39 | |
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40 | freenet URIs are _NOT_ URIs |
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41 | Whenever a "uri" is required by the protocol, freenet expects a kind |
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42 | of URI prefixed with the "freenet:" scheme, e.g. "freenet:CHK...". |
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43 | However, these are not URIs, as freeent fails to parse them |
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44 | correctly, that is, you must unescape an escaped characters ("%2c" |
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45 | => ",") yourself. Maybe in the future this library will do it for |
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46 | you, so watch out for this incompatible change. |
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47 | |
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48 | Numbers are in HEX |
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49 | Virtually every number in the FCP protocol is in hex. Be sure to use |
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50 | "hex()" on all such numbers, as the module (currently) does nothing |
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51 | to convert these for you. |
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52 | |
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53 | THE Net::FCP CLASS |
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54 | $meta = Net::FCP::parse_metadata $string |
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55 | Parse a metadata string and return it. |
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56 | |
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57 | The metadata will be a hashref with key "version" (containing the |
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58 | mandatory version header entries). |
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59 | |
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60 | All other headers are represented by arrayrefs (they can be |
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61 | repeated). |
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62 | |
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63 | Since this is confusing, here is a rather verbose example of a |
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64 | parsed manifest: |
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65 | |
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66 | ( |
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67 | version => { revision => 1 }, |
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68 | document => [ |
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69 | { |
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70 | info => { format" => "image/jpeg" }, |
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71 | name => "background.jpg", |
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72 | redirect => { target => "freenet:CHK\@ZcagI,ra726bSw" }, |
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73 | }, |
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74 | { |
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75 | info => { format" => "text/html" }, |
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76 | name => ".next", |
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77 | redirect => { target => "freenet:SSK\@ilUPAgM/TFEE/3" }, |
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78 | }, |
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79 | { |
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80 | info => { format" => "text/html" }, |
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81 | redirect => { target => "freenet:CHK\@8M8Po8ucwI,8xA" }, |
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82 | } |
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83 | ] |
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84 | ) |
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85 | |
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86 | $fcp = new Net::FCP [host => $host][, port => $port] |
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87 | Create a new virtual FCP connection to the given host and port |
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88 | (default 127.0.0.1:8481, or the environment variables "FREDHOST" and |
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89 | "FREDPORT"). |
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90 | |
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91 | Connections are virtual because no persistent physical connection is |
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92 | established. |
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93 | |
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94 | $txn = $fcp->txn(type => attr => val,...) |
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95 | The low-level interface to transactions. Don't use it. |
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96 | |
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97 | Here are some examples of using transactions: |
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98 | |
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99 | The blocking case, no (visible) transactions involved: |
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100 | |
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101 | my $nodehello = $fcp->client_hello; |
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102 | |
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103 | A transaction used in a blocking fashion: |
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104 | |
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105 | my $txn = $fcp->txn_client_hello; |
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106 | ... |
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107 | my $nodehello = $txn->result; |
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108 | |
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109 | Or shorter: |
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110 | |
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111 | my $nodehello = $fcp->txn_client_hello->result; |
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112 | |
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113 | Setting callbacks: |
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114 | |
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115 | $fcp->txn_client_hello->cb( |
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116 | sub { my $nodehello => $_[0]->result } |
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117 | ); |
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118 | |
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119 | $txn = $fcp->txn_client_hello |
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120 | $nodehello = $fcp->client_hello |
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121 | Executes a ClientHello request and returns it's results. |
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122 | |
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123 | { |
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124 | max_file_size => "5f5e100", |
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125 | node => "Fred,0.6,1.46,7050" |
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126 | protocol => "1.2", |
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127 | } |
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128 | |
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129 | $txn = $fcp->txn_client_info |
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130 | $nodeinfo = $fcp->client_info |
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131 | Executes a ClientInfo request and returns it's results. |
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132 | |
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133 | { |
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134 | active_jobs => "1f", |
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135 | allocated_memory => "bde0000", |
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136 | architecture => "i386", |
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137 | available_threads => 17, |
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138 | datastore_free => "5ce03400", |
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139 | datastore_max => "2540be400", |
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140 | datastore_used => "1f72bb000", |
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141 | estimated_load => 52, |
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142 | free_memory => "5cc0148", |
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143 | is_transient => "false", |
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144 | java_name => "Java HotSpot(_T_M) Server VM", |
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145 | java_vendor => "http://www.blackdown.org/", |
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146 | java_version => "Blackdown-1.4.1-01", |
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147 | least_recent_timestamp => "f41538b878", |
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148 | max_file_size => "5f5e100", |
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149 | most_recent_timestamp => "f77e2cc520" |
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150 | node_address => "1.2.3.4", |
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151 | node_port => 369, |
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152 | operating_system => "Linux", |
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153 | operating_system_version => "2.4.20", |
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154 | routing_time => "a5", |
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155 | } |
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156 | |
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157 | $txn = $fcp->txn_generate_chk ($metadata, $data) |
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158 | $uri = $fcp->generate_chk ($metadata, $data) |
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159 | Creates a new CHK, given the metadata and data. UNTESTED. |
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160 | |
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161 | $txn = $fcp->txn_generate_svk_pair |
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162 | ($public, $private) = @{ $fcp->generate_svk_pair } |
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163 | Creates a new SVK pair. Returns an arrayref. |
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164 | |
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165 | [ |
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166 | "hKs0-WDQA4pVZyMPKNFsK1zapWY", |
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167 | "ZnmvMITaTXBMFGl4~jrjuyWxOWg" |
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168 | ] |
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169 | |
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170 | $txn = $fcp->txn_insert_private_key ($private) |
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171 | $public = $fcp->insert_private_key ($private) |
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172 | Inserts a private key. $private can be either an insert URI (must |
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173 | start with "freenet:SSK@") or a raw private key (i.e. the private |
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174 | value you get back from "generate_svk_pair"). |
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175 | |
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176 | Returns the public key. |
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177 | |
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178 | UNTESTED. |
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179 | |
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180 | $txn = $fcp->txn_get_size ($uri) |
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181 | $length = $fcp->get_size ($uri) |
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182 | Finds and returns the size (rounded up to the nearest power of two) |
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183 | of the given document. |
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184 | |
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185 | UNTESTED. |
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186 | |
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187 | $txn = $fcp->txn_client_get ($uri [, $htl = 15 [, $removelocal = 0]]) |
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188 | ($metadata, $data) = @{ $fcp->client_get ($uri, $htl, $removelocal) |
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189 | Fetches a (small, as it should fit into memory) file from freenet. |
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190 | $meta is the metadata (as returned by "parse_metadata" or "undef"). |
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191 | |
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192 | Due to the overhead, a better method to download big files should be |
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193 | used. |
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194 | |
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195 | my ($meta, $data) = @{ |
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196 | $fcp->client_get ( |
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197 | "freenet:CHK@hdXaxkwZ9rA8-SidT0AN-bniQlgPAwI,XdCDmBuGsd-ulqbLnZ8v~w" |
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198 | ) |
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199 | }; |
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200 | |
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201 | $txn = $fcp->txn_client_put ($uri, $metadata, $data, $htl, $removelocal) |
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202 | my $uri = $fcp->client_put ($uri, $metadata, $data, $htl, $removelocal); |
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203 | Insert a new key. If the client is inserting a CHK, the URI may be |
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204 | abbreviated as just CHK@. In this case, the node will calculate the |
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205 | CHK. |
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206 | |
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207 | $meta can be a reference or a string (ONLY THE STRING CASE IS |
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208 | IMPLEMENTED!). |
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209 | |
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210 | THIS INTERFACE IS UNTESTED AND SUBJECT TO CHANGE. |
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211 | |
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212 | MISSING: (ClientPut), InsretKey |
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213 | |
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214 | THE Net::FCP::Txn CLASS |
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215 | All requests (or transactions) are executed in a asynchroneous way (LIE: |
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216 | uploads are blocking). For each request, a "Net::FCP::Txn" object is |
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217 | created (worse: a tcp connection is created, too). |
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218 | |
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219 | For each request there is actually a different subclass (and it's |
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220 | possible to subclass these, although of course not documented). |
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221 | |
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222 | The most interesting method is "result". |
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223 | |
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224 | new arg => val,... |
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225 | Creates a new "Net::FCP::Txn" object. Not normally used. |
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226 | |
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227 | $txn = $txn->cb ($coderef) |
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228 | Sets a callback to be called when the request is finished. The |
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229 | coderef will be called with the txn as it's sole argument, so it has |
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230 | to call "result" itself. |
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231 | |
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232 | Returns the txn object, useful for chaining. |
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233 | |
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234 | Example: |
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235 | |
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236 | $fcp->txn_client_get ("freenet:CHK....") |
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237 | ->userdata ("ehrm") |
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238 | ->cb(sub { |
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239 | my $data = shift->result; |
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240 | }); |
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241 | |
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242 | $txn = $txn->userdata ([$userdata]) |
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243 | Set user-specific data. This is useful in progress callbacks. The |
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244 | data can be accessed using "$txn->{userdata}". |
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245 | |
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246 | Returns the txn object, useful for chaining. |
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247 | |
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248 | $txn->cancel (%attr) |
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249 | Cancels the operation with a "cancel" exception anf the given |
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250 | attributes (consider at least giving the attribute "reason"). |
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251 | |
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252 | UNTESTED. |
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253 | |
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254 | $result = $txn->result |
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255 | Waits until a result is available and then returns it. |
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256 | |
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257 | This waiting is (depending on your event model) not very efficient, |
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258 | as it is done outside the "mainloop". |
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259 | |
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260 | The Net::FCP::Exception CLASS |
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261 | Any unexpected (non-standard) responses that make it impossible to |
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262 | return the advertised result will result in an exception being thrown |
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263 | when the "result" method is called. |
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264 | |
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265 | These exceptions are represented by objects of this class. |
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266 | |
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267 | $exc = new Net::FCP::Exception $type, \%attr |
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268 | Create a new exception object of the given type (a string like |
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269 | "route_not_found"), and a hashref containing additional attributes |
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270 | (usually the attributes of the message causing the exception). |
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271 | |
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272 | $exc->type([$type]) |
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273 | With no arguments, returns the exception type. Otherwise a boolean |
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274 | indicating wether the exception is of the given type is returned. |
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275 | |
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276 | $exc->attr([$attr]) |
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277 | With no arguments, returns the attributes. Otherwise the named |
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278 | attribute value is returned. |
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279 | |
| 10 | SEE ALSO |
280 | SEE ALSO |
| 11 | <http://freenet.sf.net>. |
281 | <http://freenet.sf.net>. |
| 12 | |
282 | |
| 13 | BUGS |
283 | BUGS |
| 14 | Should EXPORT or EXPORT_OK the MODE constants. |
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| 15 | |
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| 16 | There should be a way to access initial IV contents :( |
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| 17 | |
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| 18 | Although I tried to make the original twofish code portable, I can't say |
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| 19 | how much I did succeed. The code tries to be portable itself, and I hope |
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| 20 | I got the endianness issues right. The code is also copyright |
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| 21 | Counterpane Systems, no license accompanied it, so using it might |
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| 22 | actually be illegal ;) |
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| 23 | |
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| 24 | I also cannot guarantee for security, but the module is used quite a |
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| 25 | bit, so there are no obvious bugs left. |
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| 26 | |
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| 27 | AUTHOR |
284 | AUTHOR |
| 28 | Marc Lehmann <pcg@goof.com> |
285 | Marc Lehmann <pcg@goof.com> |
| 29 | http://www.goof.com/pcg/marc/ |
286 | http://www.goof.com/pcg/marc/ |
| 30 | |
287 | |
| 31 | The actual twofish encryption is written in horribly microsoft'ish looking |
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| 32 | almost ansi-c by Doug Whiting. |
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| 33 | |
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