common: Clean up CUPS URI generation a bit:
* Use proper URLEncoding for all URI components. The old code only handled spaces. * URLEncode the serial number too. Don't URLEncode the product strings returned in the CUPS search results.
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b53448859c
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134
backend_common.c
134
backend_common.c
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@ -27,7 +27,7 @@
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#include "backend_common.h"
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#define BACKEND_VERSION "0.37"
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#define BACKEND_VERSION "0.38"
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#ifndef URI_PREFIX
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#error "Must Define URI_PREFIX"
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#endif
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@ -170,6 +170,58 @@ static char *sanitize_string(char *str) {
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return str;
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}
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/*
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These functions are Public Domain code obtained from:
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http://www.geekhideout.com/urlcode.shtml
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*/
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#include <ctype.h> /* for isalnum() */
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static char to_hex(char code) {
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static const char hex[] = "0123456789abcdef";
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return hex[code & 15];
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}
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static char from_hex(char ch) {
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return isdigit(ch) ? ch - '0' : tolower(ch) - 'a' + 10;
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}
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/* Note -- caller must free returned pointer! */
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static char *url_encode(char *str) {
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char *pstr = str, *buf = malloc(strlen(str) * 3 + 1), *pbuf = buf;
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while (*pstr) {
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if (isalnum(*pstr) || *pstr == '-' || *pstr == '_' || *pstr == '.' || *pstr == '~')
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*pbuf++ = *pstr;
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else if (*pstr == ' ')
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*pbuf++ = '+';
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else
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*pbuf++ = '%', *pbuf++ = to_hex(*pstr >> 4), *pbuf++ = to_hex(*pstr & 15);
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pstr++;
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}
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*pbuf = '\0';
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return buf;
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}
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static char *url_decode(char *str) {
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char *pstr = str, *buf = malloc(strlen(str) + 1), *pbuf = buf;
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while (*pstr) {
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if (*pstr == '%') {
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if (pstr[1] && pstr[2]) {
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*pbuf++ = from_hex(pstr[1]) << 4 | from_hex(pstr[2]);
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pstr += 2;
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}
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} else if (*pstr == '+') {
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*pbuf++ = ' ';
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} else {
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*pbuf++ = *pstr;
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}
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pstr++;
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}
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*pbuf = '\0';
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return buf;
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}
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/* And now back to our regularly-scheduled programming */
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static int print_scan_output(struct libusb_device *device,
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struct libusb_device_descriptor *desc,
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char *prefix, char *manuf2,
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@ -179,28 +231,31 @@ static int print_scan_output(struct libusb_device *device,
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{
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struct libusb_device_handle *dev;
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unsigned char product[STR_LEN_MAX] = "";
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unsigned char serial[STR_LEN_MAX] = "";
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unsigned char manuf[STR_LEN_MAX] = "";
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char buf[256];
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char *product = NULL, *serial = NULL, *manuf = NULL;
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if (libusb_open(device, &dev)) {
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ERROR("Could not open device %04x:%04x (need to be root?)\n", desc->idVendor, desc->idProduct);
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found = -1;
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goto abort;
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}
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/* Query detailed info */
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if (desc->iManufacturer) {
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libusb_get_string_descriptor_ascii(dev, desc->iManufacturer, manuf, STR_LEN_MAX);
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sanitize_string((char*)manuf);
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libusb_get_string_descriptor_ascii(dev, desc->iManufacturer, (unsigned char*)buf, STR_LEN_MAX);
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sanitize_string(buf);
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manuf = url_encode(buf);
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}
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buf[0] = 0;
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if (desc->iProduct) {
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libusb_get_string_descriptor_ascii(dev, desc->iProduct, product, STR_LEN_MAX);
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sanitize_string((char*)product);
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libusb_get_string_descriptor_ascii(dev, desc->iProduct, (unsigned char *)buf, STR_LEN_MAX);
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sanitize_string(buf);
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product = url_encode(buf);
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}
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buf[0] = 0;
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if (desc->iSerialNumber) {
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libusb_get_string_descriptor_ascii(dev, desc->iSerialNumber, serial, STR_LEN_MAX);
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sanitize_string((char*)serial);
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libusb_get_string_descriptor_ascii(dev, desc->iSerialNumber, (unsigned char*)buf, STR_LEN_MAX);
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sanitize_string(buf);
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} else if (backend->query_serno) {
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/* XXX this is ... a cut-n-paste hack */
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@ -225,63 +280,50 @@ static int print_scan_output(struct libusb_device *device,
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}
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/* Ignore result since a failure isn't critical here */
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backend->query_serno(dev, endp_up, endp_down, (char*)serial, STR_LEN_MAX);
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backend->query_serno(dev, endp_up, endp_down, buf, STR_LEN_MAX);
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libusb_release_interface(dev, iface);
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}
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}
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if (!strlen((char*)serial)) {
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if (!strlen(buf)) {
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WARNING("**** THIS PRINTER DOES NOT REPORT A SERIAL NUMBER!\n");
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WARNING("**** If you intend to use multiple printers of this typpe, you\n");
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WARNING("**** must only plug one in at a time or unexpected behaivor will occur!\n");
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sprintf((char*)serial, "NONE_UNKNOWN");
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sprintf(serial, "NONE_UNKNOWN");
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}
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serial = url_encode(buf);
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if (dyesub_debug)
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DEBUG("%sVID: %04X PID: %04X Manuf: '%s' Product: '%s' Serial: '%s'\n",
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match ? "MATCH: " : "",
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desc->idVendor, desc->idProduct, manuf, product, serial);
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if (scan_only) {
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char buf[256]; // XXX ugly..
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int j = 0, k = 0;
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char *ieee_id = get_device_id(dev);
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char *product2 = url_decode(product);
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/* URLify the manuf and model strings */
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if (strlen(manuf2))
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strncpy((char*)manuf, manuf2, sizeof(manuf));
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while(*(manuf + j)) {
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buf[k] = *(manuf+j);
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if(buf[k] == ' ') {
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buf[k++] = '%';
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buf[k++] = '2';
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buf[k] = '0';
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}
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k++;
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j++;
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}
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strncpy(buf, manuf2, sizeof(buf) - 2);
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else
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strncpy(buf, manuf, sizeof(buf) - 2);
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k = strlen(buf);
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buf[k++] = '/';
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j = 0;
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while (*(product + j + strlen(manuf2))) {
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buf[k] = *(product + j + (strlen(manuf2) ? (strlen(manuf2) + 1) : 0));
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if(buf[k] == ' ') {
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buf[k++] = '%';
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buf[k++] = '2';
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buf[k] = '0';
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}
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k++;
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j++;
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}
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buf[k] = 0;
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j = (manuf2 && strlen(manuf2)) ? strlen(manuf2) + 1 : 0;
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strncpy(buf + k, product + j, sizeof(buf)-k);
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fprintf(stdout, "direct %s://%s?serial=%s&backend=%s \"%s\" \"%s\" \"%s\" \"\"\n",
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prefix, buf, serial, backend->uri_prefix,
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product, product,
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ieee_id);
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product2, product2,
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ieee_id? ieee_id : "");
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if (ieee_id)
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free(ieee_id);
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if (product2)
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free(product2);
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}
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/* If a serial number was passed down, use it. */
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@ -289,9 +331,15 @@ static int print_scan_output(struct libusb_device *device,
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strcmp(match_serno, (char*)serial)) {
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found = -1;
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}
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/* Free things up */
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if(serial) free(serial);
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if(manuf) free(manuf);
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if(product) free(product);
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libusb_close(dev);
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abort:
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return found;
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}
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