[8182] | 1 | #include "resumptiontoken.h"
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| 2 | #include "oaitools.h"
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| 3 |
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| 4 | /**
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| 5 | * Generate an initial resumption token from some basic details.
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| 6 | *
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| 7 | * TODO: add optional argument to set the server name.
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| 8 | */
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| 9 | ResumptionToken::ResumptionToken(const text_t &collection, const text_t &node,
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| 10 | const text_t &buildDate)
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| 11 | { this->collection = collection;
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| 12 | this->browseNode = node;
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| 13 | this->buildDate = buildDate;
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| 14 | this->startItem = 0;
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| 15 | }
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| 16 |
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| 17 | /**
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| 18 | * Generate a resumption token from a URN-style format.
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| 19 | *
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| 20 | * See getToken() for details of the format.
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| 21 | *
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| 22 | * TODO: support inclusion of an optional server name.
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| 23 | */
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| 24 | ResumptionToken::ResumptionToken(const text_t &URN)
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| 25 | { text_t::const_iterator first = URN.begin();
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| 26 | text_t::const_iterator last = URN.end();
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[11732] | 27 | text_t::const_iterator second;
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[8182] | 28 |
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| 29 | this->collection = "";
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| 30 | this->browseNode = "";
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| 31 | this->startItem = -1;
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| 32 |
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| 33 | text_t::const_iterator here = findchar(first, last, ':');
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| 34 | if (here == first) {
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| 35 | return;
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| 36 | }
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| 37 |
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| 38 | text_t oainamespace = substr(first, here);
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| 39 | if (oainamespace != "gsdloai") {
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| 40 | return;
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| 41 | }
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| 42 |
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| 43 | // increment past the first colon to get the location
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[11732] | 44 | first = ++here;
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[8182] | 45 |
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[11732] | 46 | // get the collection, browseNode
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| 47 | here = findchar(first, last, ',');
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| 48 | if (here == last) {
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[8182] | 49 | return;
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| 50 | }
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| 51 |
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[11732] | 52 | second = findchar(first, here,'.');
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| 53 | this->collection = substr(first, second);
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| 54 |
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| 55 | // cerr << "Collection " << this->collection << endl;
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| 56 |
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| 57 | if (second != here) {
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[15380] | 58 | // get past the '.'
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| 59 | ++second;
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[11732] | 60 | this->browseNode = substr(second, here);
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| 61 | }
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| 62 | else {
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| 63 | first = here;
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| 64 | }
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| 65 | // get past the ','
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[8182] | 66 | first = ++here;
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| 67 |
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[11732] | 68 | // find the second ',' to delimit the position stack
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| 69 | second = findchar(first, last, ',');
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[8182] | 70 |
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[11732] | 71 | // if not found, then get build and start item
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| 72 | if (second != first) {
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| 73 | // extract list and step past it
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| 74 | text_t offsetList = substr(first, second);
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| 75 | first = ++second;
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| 76 |
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| 77 | do {
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| 78 | second = findchar(offsetList.begin(), offsetList.end(), '.');
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| 79 | if (second == offsetList.end())
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| 80 | break;
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| 81 |
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| 82 | // extract and push the next position
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| 83 | text_t thisPos = substr(offsetList.begin(), second);
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| 84 | this->browsePosition.push_back(thisPos.getint());
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[8182] | 85 |
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[11732] | 86 | // pop the position from the list
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| 87 | offsetList = substr(++second, offsetList.end());
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[11760] | 88 | } while (true);
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[11732] | 89 | this->browsePosition.push_back(offsetList.getint());
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[8182] | 90 | }
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| 91 | else {
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[11732] | 92 | first ++;
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| 93 | }
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[8182] | 94 |
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[11732] | 95 | // now find the build date marker
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| 96 | here = findchar(first, last, '-');
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| 97 | if (here == first) {
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| 98 | this->startItem = substr(first, last).getint();
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[8182] | 99 | }
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[11732] | 100 | else {
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| 101 | this->startItem = substr(first, here).getint();
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| 102 | this->buildDate = substr(++here, last);
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| 103 | }
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[8182] | 104 | }
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| 105 |
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| 106 | /**
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| 107 | * Get a resumption token in text_t format.
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| 108 | *
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| 109 | * Resumption tokens are in the format:
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| 110 | *
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| 111 | * gsdloai:<serverName>:collectionname.browseNode,startItem-BuildDate
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| 112 | *
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| 113 | * The resumption token format does not currently implement the use of
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| 114 | * the optional <serverName> item; it is taken to default to the name of
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| 115 | * the receiving server.
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| 116 | *
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| 117 | * TODO: add server identity as an optional argument; also change
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| 118 | * ResumptionToken(text_t &) accordingly.
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| 119 | */
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| 120 | text_t ResumptionToken::getToken()
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| 121 | { text_t reply = "gsdloai:";
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| 122 | reply = reply + this->collection;
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| 123 | if (this->browseNode != "") {
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| 124 | reply = reply + "." + this->browseNode;
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| 125 | }
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| 126 | reply = reply + ",";
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[11732] | 127 | for (int i = 0; i < this->browsePosition.size(); i++) {
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| 128 | if (i != 0) {
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| 129 | reply.append(".");
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| 130 | }
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| 131 | reply.appendint(i);
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| 132 | }
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| 133 | reply = reply + ",";
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[8182] | 134 | reply.append(this->startItem);
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| 135 | reply = reply + "-" + buildDate;
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| 136 |
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| 137 | return reply;
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| 138 | }
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| 139 |
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| 140 | /**
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| 141 | * Update the position of an existing resumption token
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| 142 | */
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| 143 | void ResumptionToken::setPosition(const text_t &node, int startItem)
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| 144 | { this->browseNode = node;
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| 145 | this->startItem = startItem;
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| 146 | }
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| 147 |
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| 148 | /**
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| 149 | * Check if the resumption token is valid - only a very primitive
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| 150 | * check is done here; one ought to check for an existing collection
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| 151 | * and valid browse Node, build date and startItem
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| 152 | *
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| 153 | * TODO: implement improved validation checking.
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| 154 | */
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| 155 | bool ResumptionToken::isValid()
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| 156 | { return this->collection != "";
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| 157 | }
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